Catted vs catless downpipe b58. Just had it installed from my local shop.
Catted vs catless downpipe b58 They are more suited to be used on off-roading or tracking where every Catless downpipe BMW B58 2016+ BMW M240I 340I 440I 540 740I F20 F30 F32 F22 G30 G12. The reduced back pressure results in a faster spool. The B58 sounds amazing with a catless down-pipe! dennis very happy with it at this moment Nic This has been the best investment made for my 340i MPPK. 15-20+ wheel horsepower gains, aggressive exhaust note, faster turbo spool. The active autowerke downpipes use EPA-approved GESI cats; you are much more likely to pass emissions with these downpipes. *** Introducing the New 5-Inch SPOOL B58 Downpipe! Why Settle for the Same Rebranded Downpipes? Let’s face it—most downpipes on the market look the same. May 15, 2024 · Depends on the catted downpipe but I would say our catless is about 30-40% louder +- 10% depending on the rest of the exhaust. BUSINESS HOURS 7am-5pm Pacific Time Apr 27, 2024 · Catted (high flow): Good ones won't trigger the CEL, and have marginally less performance than catless. Mar 20, 2021 · The Fabspeed is the best because it uses an HJS cat which are the best in the world. VRSF vs Evolution Racewerks. Features* Largest diameter downpipe for B58 wor Apr 25, 2023 · Would going with a higher flow catted DP like the FI exhaust sport 200 cell, or the CG Precision DS-1 make much of a difference when it comes to power gains vs a catless DP? I'm in FL so the only concerns going catless might be the smell (never had a catless car) and the sound difference. Features * Largest diameter downpipe for B58 worldwide * 6" diameter Euro 6 400 cell catalytic converter * No CEL guarantee The CTS Turbo Catless Downpipe BMW B58 is made to maximize exhaust flow for highest power gains. The 400 Feb 25, 2016 · BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > B58 BMW 340 VM 4" CátLess D0wnpipe Dyno Testing - Before and After Results Nov 29, 2021 · Catless downpipes with a tune usually net about 20-30 whp and 30-50 wtq. The 5" versions will give the CEL, and sound horrible (boomy raspy sound). instagram. My original choice was actually Active Autowerke due to their 5" internal diameter popularity but it was backordered and the vendor wasn't sure when it would be back in stock. Considering to possibly go catted downpipe in order to get more spool/turbo and burbles/gunshots noise. High-flow S63 catted DP’s aim to use less restrictive catalytic converters. But I didn't want to deal with the stink, the rasp, and the CEL for a nominal increase in HP. The catback is APR which stays the same in b Sep 19, 2023 · The catless downpipe vs. In these videos I have B58 5 Inch Stainless Steel Downpipe Upgrade is currently on backorder. 5 Apr 10, 2022 · Comparison of the stock exhaust, a dual resonator delete, and the dual res delete with the Active Autowerke high flow catted downpipe. Made from T304 stainless steel and precision-designed using CAD technology, this performance upgrade replaces the restrictive factory downpipe, resulting in improved exhaust flow and impressive power gains. I originally wanted the CG1 catted downpipe but was back ordered for so long that I changed my order to an Feb 28, 2020 · Looking into catted downpipes right now since I live in Cali. Sound quality. the only pro for catless over high flow catted is the cheaper cost. This downpipe is made from premium quality stainless steel and is precision-engineered to fit perfectly with the stock exhaust system, ensuring a seamless installation https://www. It will not void your warranty _____ BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > 4. Any of ApexBuilt's catless race downpipes WILL NOT be sold in, or shipped to, the state of California. Both catless and high-flow catted downpipes are generally illegal. Is there rasp on a catless? I just want a deeper and throatier tone that will make more burgles and pops. Cons of Downpipe Mods. The downpipe is also designed to work seamlessly with the factory exhaust system, so there's no need to worry about compatibility issues. With catted downpipe you can also pass the visual inspection or pop up inspection that uses OBD2. What would be the best options out there that wouldn't give me CEL light. I'm running catless downpipes with stock catted midpipe and I only get a gas smell when I'm idling in my garage. if we ran a 4" downpipe flange inlet so that we can use 4" tubing, a "step" would be formed between the turbocharger outlet and downpipe inlet. In this guide, we discuss S58 downpipe upgrades including power gains, sound, catless vs high-flow, and more. In sport it sounds great. Thanks. N20 Catless Downpipe vs High-Flow Catted Downpipe. Do not compromise performance and sound with factory parts – unleash your BMW’s potential! Designed using the latest in CAD technology; this part is made to fit perfectly in place of your factory downpipe. Nov 5, 2023 · Sound clip differences between catless and catted downpipes. 0L. Having gone through VRSF catted to Evolution Racing catless and back to OEM, I decided to try the AFe catted downpipe because it was cheap from x-ph. Ya'll both on stock mufflers? Reply reply Because you recently put a VRSF catless downpipe on a g30 540i! Reply reply Want to install a downpipe on your B58 equipped BMW, but still need to pass emissions? Evolution Racewerks has the answer for you with their B58 Catted downpipe. Should work the same vise versa. That takes any guesswork right out of it for me. I'd like to order a catless downpipe. You can see light coming through at a certain angle. Orders will be fulfilled by second week of March. 5" vs 5" catless downpipe Google Search Search Forums Aug 15, 2020 · We did not give up, comparing the two the ONLY difference was the catted DP on my car (Activeautowerke) vs his catless DP Pressure tables were lower and cat heat limits looked like they were at the max due to the extreme weather Anyways, decided to go all in. We are proud to introduce our VRSF race & catted downpipe for your B58 X3 M40iX & X4 M40iX. 5 Nov 3, 2024 · While upgrading the downpipe of your B58 engine, you need to select one from two downpipe categories. The catalytic converters are engineered to deliver maximum flow and minimal back pressure, which results in a noticeable improvement in engine sound and overall driving experience. Jan 10, 2024 · There's a few, essentially any that use a 400cel GESI cat. Catted downpipes incorporate a catalytic converter, making them the road-legal option. MST 6" Catted Downpipe OPF for BMW B58 X3 X4 X5 X6 X7 40i (BW-5809DP) US$1,388. There are so many options in the market ranging from. Manufactured from T304 stainless Read More "CTS Turbo 4. My personal recommendation is to go for catted high-flow downpipe. The cost of a catless exhaust system typically ranges as follows: Catless Downpipe: $150 - $800 Catless Full Exhaust System: $400 - $2,000 Installation: $100 - $500 Prices depend on the vehicle model and brand. Even deeper tones, even better sound, and improved turbo spool. Even if you have a 2024 - pay to get an unlock and get a tune and a catless dp - won't cost much more than an AA and you get a LOT more benefit - a LOT. The Evolution Racewerks Competition Series Catless Downpipes is constructed from 304 stainless steel, featuring mandrel bent piping. Sep 12, 2024 · Among the best bolt-on upgrades are a set of catless or high-flow catted downpipes. Just had it installed from my local shop. Therefore, catless DP’s will result in the best power gains and quickest turbo spool. But for what they cost, get a tune and a catless or 200cel. So then you get into the 200 vs 300 vs 400 cel debates which are endless. We use a 200cel because it flows almost like a catless. Fabspeed is the only one that I know of that dyno tests performance and got 93% of the performance of their catless downpipe. VRSF 4. On the other hand, S63 catless downpipes have absolutely no catalytic converters. This VRSF B58 Hi-Flow Catted Downpipe (Mfg#10582061) fits BMW G01 X3 M40i B58 3. Check with your states/local areas emissions and inspection regulations. The catted downpipe is an APR and the Catless is ARM. Feb 22, 2022 · All of which again get affected by your choice of catted vs catless DP. Shipped quick and fit like a charm. Mar 24, 2020 · Catless vs. 5″ G20/G22/G26 B58 Stainless Steel Downpipe. Similar to sound is the smell, with a catted DP you still get a little bit of the gas smell but catless will be stronger. All VRSF downpipes are hand crafted from SS304 grade stainless steel and include a lifetime warranty as well as our “No Hassle” satisfaction guarantee (includes fitment). Explore a comprehensive comparison between catted and catless downpipes, examining performance, emissions, sound, and other considerations that influence your choice. com/TURBOSPOOLE85/I wanted to answer the question if there is in fact a difference in power between a high-flow cat downpipe, and a cat A warranty job can be denied if the dealership blames your aftermarket product for the damage. The F Chassis B58 downpipes are strategically engineered to virtually eliminate the immensely restrictive characteristics of the factory downpipes – therefore reducing radiant heat and increasing performance. I like catted. Feb 20, 2025 · The durability of catted and catless downpipes can vary. Having either your primary or secondary cats should heavily reduce the smell. This will bolt on to your oem exhaust(no modification needed), or can be cut at the taper and welded to a true custom upgraded exhaust, with the add Description. Catted downpipes are fitted with a high-flow catalytic converter, which cleans the gases just as your OEM catalytic converter will. In terms of power output, it is a misconception that a Catless Downpipe automatically makes more power than the High Flow Catted Version. Catless downpipes provide less back-pressure compared to high-flow catted options. 6" B58 Catted Downpipe - 240i 340i 440i 540i 640i 740 Replace a faulty catted downpipe with an OEM downpipe or upgrade for more performance with our selection of The B58 sounds different from the N55. com/In I’m look for recommendations on the best catless downpipe for a 2018 340i B58M. 5" outlet compared to the 4" outlet on the older N55 engines. Catless downpipe is not daily drivable. 0L, BMW G02 X4 M40i B58 3. And high flow vs. For catted I would do cobb but they might have stoped selling catted portion. 00 . Suitable for BMW/Toyota B58 3. Experience an incredible sporty exhaust sound without compromising on cruising Apr 7, 2020 · B46/B48 Catless vs High-Flow Catted Downpipe Catless downpipes are the least restrictive option, and will therefore provide the best power gains. G-Chassis B58 Gen 2 GESI High-Flow Catted Downpipe - W Apr 25, 2023 · B58 6-Cyl Engine, Exhaust, Drivetrain, Bolt-Ons If your local to SOFL more than welcome to ride in mine @Jesse DaBears race catless downpipe or my buddy’s 400 Jul 1, 2022 · Catless with no check engine does not exist. 5" Catted Downpipe So either deal with a CEL or you need to go a 400cel dp. Running with AFe Magnum Force intake and BM3 stage 2 ACN91. Installation - as with most downpipes for the B58, it's easy. Catless downpipe options for the N20 are the least restrictive, and will result in the best power gains and spool. These downpipes are THE best bang for the buck mod available for your B58 and they’re available in both race & high flow configurations. It was $1400 for just the pipe BMW introduced a new valvetronic, single turbo version of its direct-injection engine for the later F-Chassis models beginning in 2016. 5″ Race Downpipe for BMW B58 1 This is for there 2020 M40i B58. 0L Cold Jul 19, 2021 · I think this is all covered by existing threads, but FWIW I chose Active Autowerke MAPerformance for my 2021 3. Mar 19, 2020 · The downpipe is not as loud as the catless downpipes, but it is significantly much louder than stock DP. Of course, each state has different laws, so it's not 100%. Was lucky to find a local shop that has an AMS catless DP AMS catless vs AA catted DP All VRSF downpipes are hand crafted from SS304 grade stainless steel and include a lifetime warranty as well as our “No Hassle” satisfaction guarantee (includes fitment). It is because of the presence of the catalytic converter. 0 Premium. Most catted downpipes come with a “high flow sports cat”, which are less restrictive catalytic converters that allow for improved performance while still passing emission tests. 0 engine vehicles. Orders received by noon EST on business days are shipped the same day The ARM 6" B58 Downpipe takes the title of being the largest catless downpipe available for the B58 platform! The sound coming from your B58 with the 6" section in the ARM B58 Downpipe will astonish you. Video: Pics: Oct 5, 2020 · Catted downpipe should be daily drivable. Sounds much louder with extra performance you can feel. Love this down pipe! Derrick Great product. There is a pretty significant price difference in the 2 in my opinion top brands for catted downpipes. Overall, the Mad Catless B58 Downpipe is a must-have upgrade for any BMW B58 engine owner who wants to improve performance and unleash the full potential of their car. *Fits all Gen 1 and Gen2 B58s (and supra)* Introducing the BimmerNetwork B58 High Flow Catless downpipe. I'm looking at the VRSF B58 catless and high flow catted Downpipe. Though, catless downpipes do come with one downside. The logo on the metal pipe does not matter. The Active Autowerke B58 downpipe for the M240i, 340i and 440i helps unleash some of the potential that is restricted by the OEM downpipe. May 13, 2022 · This is what I plan to do too. Catless DP’s are less restrictive as compared to high-flow catted downpipes. Catted Downpipe In this video, ill show you How To Install A Downpipe On Your BMW B58 M340i! Active Autowerke Catted DownpipeProducts as seen in this video:Active Autowerke Jul 5, 2020 · This is where catless and high-flow catted DP’s come into play. In basic terms, performance increases as back-pressure decreases. 4301 (SS304)- Complete Ø3,5 and adapter for stock exhaust- Without catalyst converter- 100% perfect fit, replace OEM- Less thermal load on the turbocharger- More power by reducing back pressure- Significantly more torque We Aug 15, 2020 · I have a 2021 so they really toned down the burgles and pops and that was such a disappointment for me. New Release- MAD B58 4. Both of these have their fair share of pros and cons, depending on usage. catless really only becomes apparent at prodigous boost levels. Decrease turbulence and increase flow with a 200 cell high flow cat from VRSF! × The new turbochargers on the B58 engines utilize a much larger 4. However, catless downpipes do have a significant pitfall for some. So yes, you're unlikely to detect a performance difference comparing catted to catless. To avoid the check engine light, you need a flash tune or O2 spacers/extenders. high-flow cat debate is a hot topic in the automotive world. I am running a BM3 Stage 2 on 91 octane tune with the cold start adjustments. The Evolution Racewerks cat-less racing downpipe for the B58 engine used in the 2019-2020 Toyota Supra 3. Learn how these components impact your vehicle's performance and emissions. Yes, a catless downpipe will sound noticeably more aggressive. There is still some smell, but significantly better compared to catless setup. I'm hesitating between the CTS turbo catted and the VRSF catted downpipe. 5″ BMW X3 M40iX G01 & X4 M40iX G02 B58 Stainless Steel Downpipe. Im pretty sure most of yall dont want to spend 400$ at a shop to install the your brand new downpipes so Im making a DIY for you all, It took me 3 hours or so to put it in because ive never done a downpipe in my life before, but I will show you Jul 2, 2020 · S55 Catless Downpipes vs High-Flow Catted Downpipes. The catted downpipes are not easy to sight and do not emit harmful gasses. PRODUCT SPECIFICATION - Catless Downpipe Kit for BMW M140i M240i 340i & 440i- Made out of high-quality stainless steel 1. Welcome to our exhaust sound demonstration! In this video, we show off our 2023 BMW M340i by comparing the stock exhaust system to the upgraded Active Autowe May 12, 2021 · Though, catless N54 DP’s are the best bang for your buck option. S63 Catless Downpipes vs High-Flow Catted Downpipes. The ARM B58 Downpipe is one of the foundational upgrades for giving your B58-powered BMW more power, torque, and sound. You can either go for a catted downpipe or a catless downpipe. Great down-pipe. Jan 11, 2024 · Performance boost is intangible if you aren't on a track or drag strip. The real difference is catless will be a bit louder and more raspy than catted which is louder and more raspy than the stock DP. I dont think I will pass inspection with a catless downpipe but I still want that aggressive tone to my exhaust. Our B58 Catted Downpipe design incorporates a 6" high-flow 200 cell ceramic catalytic converter, making it a standout choice for those seeking power without while reducing emissions. co Jul 13, 2023 · the two best catted downpipes are fabspeed and active autowerke, but you will ruin any catalyst with excessive pops/burbles/gunshots. 5″ A90 Toyota Supra B58 Stainless Steel Downpipe The ARM 6" B58 Catted Downpipe is perfect if you're looking for all of the performance of a Catless B58 Downpipe without the odor associated with increased emissions. Catless options will completely remove the catalytic converter while high-flow options will use an upgraded or higher performance cat that is less restrictive than the OEM system. I f we ran a 4" downpipe flange inlet so that we can use 4" tubing, a "step" would be formed between the turbocharger outlet and downpipe inlet. They also mentioned they have been using this 400 cell Gesi Catted downpipe on the B58 Supras and has been zero issues with CEL's. Made from hand The ARM 6" B58 Catted Downpipe is perfect if you're looking for all of the performance of a Catless B58 Downpipe without the odor associated with increased emissions. Customization: Catted downpipes offer customization options with various catalytic converter types and sizes. Current have a 440i coupe with MPPSK. So, it really comes to your personal preference and goals while choosing one of them. Features: Jul 7, 2021 · OEM downpipes are always connected to catalytic converters because that’s the standard they have to follow. Come on. ADD TO CART. The ER B58 downpipe is Made in the USA from 304 grade stainless steel and mandrel-bent piping. I had to have my friend hold the gasket in place on the downpipe while I push the downpipe up from below the car to seat into the turbo. 5" Catted Downpipe. 1. BMW 340i B58 VRSF Downpipe DIY :) NO CEL ;) *SOUND CLIP* Stock exhaust+Catless DP Hi fellow b58 ppls. So I sold it and bought catted one. ADD TO CART . The Mad Catted B58 Downpipe is also equipped with high-flow catalytic converters, which help to reduce harmful emissions while maintaining optimal performance levels. Jan 1, 2023 · While a High Flow Catted B58 Downpipe is usually cheaper than the OE B58 downpipes, the price of a good High Flow Catted B58 Downpipe is still significantly more than the Catless version. The B58 downpipe fits the BMW M140I, M240I, 340I, 440I, 540I, 640I, 740I, 545E, 745E, X3 X4 40i and Toyota Supra MK5 I have a race catted Downpipe from active autowerke that was advertised CEL free guaranteed. Spacers/extenders will work on any brand downpipe, you might as well get the cheapest good quality downpipe you can find. In comfort mode it is fairly quiet but more aggressive than stock. FOLLOW MY INSATGRAM https://www. 0 eliminates the stock catalytic converter for unimpeded flow. So it’s definitely possible. 5inch all the way until the exhaust meets the dp. High-flow catted downpipes may pass emissions in some states, but tampering with OE emissions equipment may still be illegal. The catted option is better for the stock turbo; it's louder than stock but not raspy and has a deeper mid-range tone. This is a TRUE 4. Jun 29, 2020 · However, worry not. $250-$450. Guaranteed no CEL. Pushing 500+hp its safe to say you need need to upgrade the down-pipe for various reasons and add an intake as well. They also promised to replace it if there was one The first time I got a CEL (unrelated to Downpipe) they were very helpful and were ready to replace it when I called. Anyone got a recommendations? As of right now, the popular ones are AFE and Active Autowerke. If you look into the stock downpipe, you can't even see light come through the other side. Ask technical questions, contribute answers, or show off your ride. They offer more performance and generally cost less. Personally, I am catless and if I ever go 600hp, I will definitely be catless. I plan to just stick with downpipe + tune + intake/chargepipe. fitmentindustries. Catless downpipes might be more susceptible to heat and exhaust gas damage. . With Active Autowerk's Signature downpipe, your B58 can rev quicker, and deliver more horsepower and torque. We are proud to introduce our VRSF race & high flow catted downpipe for your B58 M240i, 340i, 440i, 540i, 740i & xDrive variants. Because catted downpipes contain a catalytic converter, they significantly reduce harmful pollutants. Bringing even more performance & exciting exhaust sounds to your vehicle. The standard catted downpipe is unlikely to pass emission in most states since they trigger the check engine light. The The new turbochargers on the B58 engines utilize a much larger 4. Jul 1, 2021 · So I'll be installing the JB4+ EWG as soon as I hit 1200 miles. So if you aren't dropping 10k on performance mods and don't mind having the car on jack stands once every month or two then catless really isn't doing anything for you. Aug 16, 2023 · Cts turbo downpipe Project gamma dphttps://youtu. MST 2018-2025 BMW 330i G20 B48 2. g20/LEAVE A LIKE IF U ENJOYED THE VID :) MORE 2 COME!Use My Referral Link team. Sep 17, 2023 · There is no power difference on stock cars between catless and high-flow catted. BMW B58 downpipe upgrade for 2019+ M40i models. Upgraded downpipes help reduce backpressure and improve turbo spool, which results in impressive performance gains. The Aftermarket BMW B58 Downpipe Catless or High Flow Catted will improve flow and performance. be/MOHbEUMjgmk The MAD 5 inch Catless B58 Downpipe is a high-performance aftermarket upgrade for BMW B58 engine vehicles, designed to increase power and torque while improving exhaust flow. Exhaust gas for the turbocharger would hit this "step" and a lot of Went with catless on my F10 535i Unfortunately if you daily the car the smell is quite unpleasant (feels like/worse than a diesel). N63 Catless Downpipes vs High-Flow Catted Downpipes. I think user B58 had the 5" catted downpipe but recently switched to the 4. Mar 2, 2022 · The catless downpipes do not have a catalytic converter, and it is easy for cars with catless downpipes to emit dangerous amounts of gasses. The increased volume and improved turbo spool Jun 30, 2020 · Enter catless and high-flow catted DP’s. Bringing even more performance & exciting exhaust sounds to your vehicle. Catless downpipes allow engine exhaust to flow without any restrictions and rely on the high-flow catalytic converter for pollution control, while high-flow cats restrict engine exhaust to reduce noise and emissions. Please note that the warranty on the catted downpipe is limited to two years. All catted DPs are also not created equal. High-Flow Catted Downpipes The only difference between these two options, as you can imagine, is a catalytic converter. Product Details. If you must use a downpipe, we recommend using a catted downpipe. Made from hand crafted, tig welded 4. That's why I went with an AA catted downpipe. This downpipe is THE best bang for the buck mod available. This makes them a more environmentally responsible choice and ensures compliance with emissions testing in many Maximize your BMW B58's performance and unleash its true potential with the CTS Turbo 4. Make an informed choice for your next upgrade. It provides additional performance but still keeps the emission, noise and smell acceptable. Nick Discover the key differences between catted and catless downpipes for your BMW. May 15, 2023 · The stock downpipe was fairly easy to remove however the most time consuming parts was getting the v-band clamp on without the gasket falling off and pushing the the stock mid-pipe onto the downpipe. S58 Downpipe Performance Gains Dec 10, 2024 · Emissions and Environmental Impact Emission control is one of the most significant differences between catted and catless downpipes. A catless downpipe is one that is not fitted with a catalytic converter. I'm trying to avoid having to tune my car to stage 0 or 1 in order to get rid of the CEL Catless gets you more hp, I would suggest grimspeed but catted is epa friendly so if you have to do emmisions test every year I would do catted. High horsepower and torque gains. I wanted a catted DP that did not cause a CEL. Catless and high-flow catted downpipes are great options. I’d prefer ones that don’t throw a CEL too and most likely going to pair the downpipe with a tune. Email customer_service@spoolperformance. Catted downpipes and catless downpipes. The Catted DPs that guarantee no CEL generally have a higher cell count which also directly affects the sound amplification. F30 is a sub dedicated to all things 2011 - 2019 BMW 3 series. An aftermarket catted dp uses a high flow cat with fewer, wider cells. BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > VRSF catless downpipe and Bootmod3 Stage 2 review (with pics and video/sound) PSR Parts offer high quality BMW B58 Downpipes. Catted systems may be more durable due to the protective nature of the catalytic converter. Suitable for BMW/Toyota B58 3. A catless downpipe does not create any additional stress on other components, in fact it reduces backpressure n your turbo. A larger down pipe relieves some of this pressure, resulting in quicker and more efficient spool. B58 downpipes. As such, they will result in better power, torque, and spool. I was wondering how the sound was going from catted to catless. com/inzane. I suspect other catted downpipes aren't as good or they would publish testing. Is any reason to choose one over another? Titan Project Gamma VRSF B58 Mppsk + catted downpipe choice Looking to potentially put a catted downpipe on my 440i mppsk. Stick to catted downpipes with the 4" catalyst vs those bragging 5" on a 4" downpipe. This is one of the highest-efficiency downpipes worldwide. Minimizing back pressure while retaining daily drive-ability was the goal of our B58 downpipe. If you are looking for more noise go catless or do resonator delete. Less back-pressure results in better power and performance gains. Paired with the stock cat-back exhaust, the downpipe improved the sound to the point where I likely do not want an aftermarket catback. Catless is louder than both but also raspy and generates a fuel smell. See full list on bmwtuning. Works very well on Stage 2, 2 Jun 10, 2021 · That delta is even smaller when you're looking at a high quality catted downpipe. More on the specific gains of each in the next section. go catless or run normal pop/burbles Sep 23, 2022 · What sold me on going catted vs catless was the guaranteed no CEL from Active Autowerke and didn't want to deal with the smell. User Experience The good Feb 2, 2023 · This is one of the highest-efficiency downpipes worldwide. us if you have any questions. I was going for power and throttle response more than noise. If your state has inspections and/or emissions testing the S55 will likely fail with catless DP’s. noxasubektgebscserzukqbtvldftoipapcnwclvehyfdmyprprpzenzaqbeaqptvkctxkszafbvkjdq