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    B9 s5 catless downpipe upgrade reddit. From there the ARM B9 S4 Downpipe has a massive 6.

    B9 s5 catless downpipe upgrade reddit Usually a tuning company would tune out the rear 02 so you wouldn’t get that code, at least that’s how mine have gone in the past. Stock B9 RS5 is equivalent to stage 2+ in terms of power. ***FREE SHIPPING TO LOWER 48 USA!*** World's Best Downpipe for the B9 Audi A4 2. Posted by u/Responsible-Pea855 - No votes and 1 comment Hey all, I have a 2018 Audi S5 coupe with an ABT Power upgrade. Are there any downsides to CTS like reliability issues, performance, sound, and drone with the CTS downpipe? Thank you. Valheim Genshin Posted by u/jimbob77777888 - No votes and 1 comment Audi B9 S4/S5 3. CAP 3. Perfecte pasvorm (zoals origineel), dus ook voor deze rvs Downpipe Audi S5 geldt onze pasgarantie. I'd start with muffler deletes before downpipe. The downpipe carries exhaust gas from the hot side of your turbo to the rest of the exhaust system. A stage 1 S5 with air intake, intercooler, and on regular pump gas can match the speed of an RS5. 2 6MT, R8 4. We entertain beauty shots and thrive on discussing mods whether they're cosmetic, functional, or both. 0tfsi 354pk Perfecte pasvorm (zoals origineel), dus ook voor deze rvs Downpipe Audi S4 geldt onze pasgarantie Audi S4 3. You should see an increase in performance. Am I able to buy stock rs5 lights and install them on my s5, will that fit? Any recommendations or opinions welcome! Thank you 2018 s5 sportback prestige CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3. Turbo Catless Downpipe For Audi B9 S5/S4 V6T 3. Mine is tuned for 93 octane, a catless downpipe, exhaust and intake. Not really looking to spend another $800 + until I sell the catless pipe Other thing I was thinking was keeping all the supporting mods and just flashing back to stage 1 and re install the stock downpipe & cat. SKU: DP-AD-254 Category: Audi. $2400 for parts plus 7hrs labour. I haven't owned a German car that I didn't replace the Cat's immediately other than my current Mercedes because the cost is outrageous. 0 coins. I am going to go catless as RPM will tune it to shoot flames but since there will be a period of time between the install the downpipe CEES Catless Exhaust Downpipe For Audi S4 S5 B9 3. I find it has just enough power that it’s not boring and still get great gas mileage out of it. Full bolt on with E40, you will be pushing 500 bhp. 5 AUDI S4, S5 is constructed with top quality 304 Stainless Steel. Generally the downpipe will go hand in hand with said tune for that reason. 00 Regular price $260. From what i've learned, flashing the ECU with a new software provided by 034 Motorsport, Integrated Engineering or Unitronics will get you to Stage 1 and give you a decent hp boost. 0t quattro?? comments sorted by Best Top New Controversial Q&A Add a Comment NardDog_1234 • B9 SQ5 31K miles Stage 1 Custom Tune IE FDS Intercooler IE Cold Air Intake IE Turbo Inlet Redstar Downpipe — stage 2 08/22 馃馃馃 comments sorted by Best Top New Controversial Q&A Add a Comment The ARM B9 S4 Downpipe is a critical upgrade for the Audi 3. Replace a faulty catted downpipe with an OEM downpipe or upgrade for more performance with our selection of aftermarket performance downpipe options. From the same team that brought the B8 Audi S4 world the absolute best test pipes on the market, with over 500 sets installed without a single one cracking, Can Auto Performance is proud to show some love to the 2. It is the exhaust valve making the noises. A catless downpipe is most likely not flanged at the cat for quick removal, and probably has to be installed/uninstalled as an entire unit. I was wondering if anyone has experience with it? My largest concerns are drone and the check engine light staying on with the cat delete. 0T EA839 engine, found in the B9 S4 and S5! The ARM B9 3. 0T, the CTS B9 S4/S5 3. Brisk racing spark plugs and I opted for the APR coils packs. When valves are closed exhaust gasses are routed through the muffler resulting in a low-profile comfortable drive. upgrade to an S5 lol the A platform is very quiet. 0T EA839 engine found in the B9 S4 and S5! It frees up exhaust flow from the turbo, allowing your 3. for the install skip to 2:28im going to post more videos like This sub-reddit is dedicated to everything related to BMW vehicles, tuning, racing, and more. Performance-wise really all you need is a catless downpipeCAI and cat-back exhaust provide essentially no performance gains on stock turbo. The downpipe doesn't add any hp at all. Mechanic said these photos show coolant leaking and the pressure in the coolant system isn’t what it should be. Dont mean to hijack this thread, but he installed a Redstar downpipe with HJS HD 300cpsi Euro6 Catalyst (http://www. I have a buddy at work with a 3+ S4 that is absolutely absurd. The stock intake and cat flow well enough for the increase airflow of a stage 1 tune. lookinto an ECU tune. I’m looking for the best overall for performance, price, and sound. I don't like the catless videos I have listened too. It's something like a $10,000 fine if you are caught running catless on a street car. Premium Powerups Explore Gaming. Whether you opt for the Audi S4 B9 downpipe, Audi S5 B8 downpipe, Audi B9 S4 downpipe, or the Audi A4 B5 downpipe, you can be assured of improved performance, enhanced sound, and a smoother driving experience. I do not think an intake is a make or break here. Aug 5, 2021 路 My buddy with a b9 s4 calls it a test pipe where I would have called it a catless downpipe. 0T platform. 5 sounds much nicer (supercharger whine) and has a raw feel to it because of DSG transmission. . I think you’re getting the exhaust drone confused with someone cutting the muffler out and making it a straight pipe. One of my coworkers just got a new RS5 and offered to sell me the CTS downpipe he had on his b9 s4. It's the smell, inspection and the fuzz that are the real concerns. 00 get the catted man. res deletes will make it sound better, but not much louder. also found IE Aluminum Charge Pipe Kit For Audi B9 S4, S5, SQ5, & C8 A6, A7 (performancebyie. Advertisement Coins. The S4 can greatly benefit from an upgraded intercooler even without a tune. oT; To remove the CEL that will occur, proper stage 2 tuning software must be used. A lot of tunes require catless downpipes in order to go up a certain “stage”. If I guess I would have to buy a high flow catted downpipe to replace the catless one. Talk to your dealer and find out if they are flexible with any particular modifications. 0T (EA839) cat-delete test pipe is made to maximize exhaust flow for highest power gains. S5 B9 3. 0TFSI Stainless Steel Decat Downpipe with Heat Shield The S4 downpipe and flanges are machined from SS304 aircraft-grade stainless steel and are tig welded in house The downpipe is 5” straight out of the turbo and 2. B8. May 27, 2023 路 The New Marketplace (All new FS items go in here) - RedStar Catless Downpipe for Audi s5 B9 - For sale is a meticulously maintained Redstar Catless Downpipe designed specifically for the Audi S5 B9. It's called smart spending. Will get a JB4 tune to not void warranty (will be well hidden) and then a cold air intake upgrade (suggestions on a good one?) After all that I’ll deal with exterior cosmetics. 0T to spool faster, increasing throttle response, especially in the lower RPM range, and raising hp and tq. Some tunes require the downpipe and also the rest of the exhaust to be changed to give the power increases they promise but the tune will still increase power even with the stock stuff on, just not so much. The IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow without a check engine light. I personally have a stage 1 S5 planning on going dual pulley soon. it really seems like it takes some work to upgrade the g70 exhaust Why buy an RS5 when you can buy an S5 and modify it? The mods wouldn't even cost 1/2 of the price difference if you got an RS5. The way i had it explained to me is when you’ve got a big long uninterrupted pipe the thing is gonna vibrate and resonate a ton. Mine sounded fine for months, and then all of a sudden started clattering. Reply reply More replies More replies Top 8% Rank by size As someone else mentioned, power gained from stage 1 to stage 2 isnt worth it imho. com/produc-tfsi-downpipe) to avoid the CEL. And my exhaust note is perfect with the Res delete. Designed to eliminate restrictive factory components, this downpipe optimizes exhaust flow, delivering unmatched performance gains and a bold, aggressive exha Dec 7, 2022 路 B9 SQ5 Navarra Prestige | 034 Stage 3+ TTE810, Wagner FMIC, CTS catted downpipe, 034 HPFP upgrade, 034 X34 Intake, 034 Inlet, 034 Trans insert, 034 ZTF-01 Forged 21x10 et32 + 5mm rear spacer, 295/35, CETE Module, Fuel-it, Maxton body kit, Past: B9 S5 Sportback, B8. I recently put a downpipe in my b9 s4 and my CEL came on any suggestions on how to get rid of it the code I’m getting is P0141 Related Topics Audi S4 Audi A4 Audi Volkswagen Group Cars and Motor Vehicles B9 S4/S5 3. When installed with factory exhaust it produces a sporty growl with much more pronounced exhaust “crackle” on downshift. all those options you mentioned would improve the sound. If nothing else than for the power and sound of the supercharged 3. 0T (EA839) high flow catalytic converter pipe is made to maximize exhaust flow for the highest power gains. 0T Potential! Nov 28, 2023 路 - RedStar Catless Downpipe - Wagner Intercooler (another upgrade that really made a difference in how linear the power is throughout the range) On Order: - Pure 750 - 034 Springs, End Links, Boost Tap Kit, 4 Bar Map Sensors - APR Mechanical Boost Gauge - Upgraded HPFP - Upgraded Injector Put a resonator in your downpipe if you’re set on being catless. 0T side of For one I feel like it pulls a little harder up top ~ 90+ mph. After driving both B9 and mine. A Reddit community for Audi Enthusiasts and those who love four rings. If you’re looking for the piping that is between the engine and your exhaust, it’ll be the product that has two pipe leading into a giant opening. then just getting a full catback exhaust later on. It’s a 2022 s5 premium plus in Navarro blue, I’ve already stage 1 tuned it with an 034 tune, I have about a thousand dollars to spend on mods and I was thinking spend it on a cold air intake and maybe a turbo inlet pipe and some transmission mounts maybe which is about 800-900$ or just spend all of it on a IE catback Sep 24, 2016 路 No spacer will stop a CEL on the new audi/vw emissions systems if you are catless. May 31, 2024 路 For sale is an ARM catless downpipe for Audi S5 B9. Reply reply Great power upgrade with uncompromising performance; Incredible sporty exhaust sound, subtle when cruising; No drone with factory exhaust; Installation hardware is included; Fitment: 2018+ B9 Audi SQ5 3. 0T quantity. 0t Turbo *Available Options: Ultra high-performance 200 cell HJS HD, Made in Germany most reputed high flow converters for their outstanding characteristics, quality and durability. This Downpipe is a direct bolt-on upgrade, designed to optimally eliminate unwanted restrictions in the factory downpipe, reduce turbo lag and enhance the exhaust note, while utilizing a 6” 400cpsi ultra high output catalytic converter which was In summary, the Audi S5 B9 downpipe is a fantastic upgrade for car enthusiasts aiming to maximize their vehicle's potential. Turbos benefit from the back pressure of the catalytic converter. No damage whatsoever. This could have definitely played a part in my engine failure lol. Aug 11, 2022 路 Things to do that are good for the car would be an aftermarket intercooler and cold air intake. 5" section to maximize exhaust flow straight off the turbo, which then transitions to a Y-section. Catless Downpipe is going to have a lot of smell which I don’t prefer. 0T, giving you the sound My B9. 5 3. personally i think cts is a good middle ground for a downpipe, cheap and good quality for the MOST part, some of their pieces are terrible. You need a downpipe that uses a GESI or better catalyst to avoid CEL. I am currently in the process of upgrading my N18 R56 S to go stage 2 (already have intercooler, DV and straight pipe exhaust) so the last step is the downpipe. Fits OEM turbine housing with v-band clamp and midpipes. On average horsepower is expected to increase from 5-10% after installing a full catless system, which includes a valvetronic catback and ultra-high flow downpipe. With the JB4 you might also want to consider a bigger intercooler to give you some more leeway before intake temps cause pinging and timing pull. These are actual pictures. Edit: I went off track. It’s in like new condition. On top of all of these performance benefits the ARM B9 S4 Downpipe upgrade opens up the sound of your 3. Great power upgrade with uncompromising performance; A Reddit community for Audi Enthusiasts and those who love four rings Members Online Audi RS3 takes the Nordschleife compact car crown back, beating the BMW M2 by 5 seconds! 7:33. at least for me. 0T (EA839) Test On turbo cars catless downpipes get the most power gains compared to any other exhaust upgrade. RVG vs VRSF Catless Downpipe . Text for fastest response 7608462714 This catless downpipe (covered in heatshielding) was installed on my own Audi S5 r/GolfGTI is a place for enthusiasts to discuss, ask questions, and share information about the best car that can be had for less than $40K. I am running stage 1+ (93 octane). 0T to spool faster, increasing throttle response, and boosting power and torque. Featuring a large-diameter design and seamless transitions, this downpipe ensures optimal exhaust flow, unlocking impressive power gains. Both stainless steel design, comes with heat shield and HFC. 0T 2019-2023 Stainless Steel Racing Exhaust Pipes Downpipes without catalyst Regular price $260. Works very well on Stage 2, 2 Does anyone have any recommendations or knowledge on how I can upgrade my headlights. So I sold it and bought catted one. The O2 sensors are much more sensitive and even a low quality HFC downpipe will cause a CEL. The CTS downpipe is $400 cheaper. Add to cart. Mar 10, 2025 路 The Unitronic Performance Downpipe for the 2017+ S4® & S5® 3. View community ranking In the Top 5% of largest communities on Reddit. 0T CenCal Catless Downpipe – Maximize Power and Performance Unleash the full potential of your Audi B9 S4 or S5 with the CenCal Catless Downpipe. 0TFSI® EA839 (CWG) engine is a direct bolt-on upgrade, designed to optimally eliminate unwanted restrictions in the factory downpipe, reduce turbo lag and enhance the exhaust note. Show Printable Version; 05-12-2024 11:40 AM #1. 0T potential! Designed using the latest in CAD technology; this part is made to fit perfectly in place of restrictive factory catalytic Read More "CTS Turbo 2018+ B9 Audi S4/S5 V6T 3. I can't find the actual dyno thread but from my memory, downpipe gets you ~10-15 HP, so a stage 2 tune with a downpipe gets a total of ~25HP more than a stage 1 with cats. 0T potential! Designed using the latest in CAD technology; this part is made to fit perfectly in place of restrictive factory catalytic I've had it both ways in the past and honestly it's not worth it. Audi S5 3. If you want to install something will actually benefit, go with larger intercooler. Stage 1 no parts needed, stage 2 u need cold air intake, downpipe, Wagner intercooler with charge pipes, res delete X pipe. Manufactured from T304 Maximize Your Audi B9’s Performance with Our Catless Downpipe with Heatshield. 0TFSI 354Pk | S4 B9 3. Catless downpipes may possibly cause issues. Off topic: I plan to keep the stock exhaust. 5 SQ5, mk4 R32, mk6 R, mk4 gti, '95 90 Quattro sport My 2019 S5 has ~25k miles. A Hardcore Tech Upgrade - AMD I see a lot of catless downpipes that all vary in price. 5t accord but was wondering if I would be able to fit it on a 2018 civic si anyone think they know Unitronic® is proud to release its Performance Downpipe for the 2017+ Audi® S4® and S5® equipped with the 3. My personal recommendation is to go for catted high-flow downpipe. This Downpipe is a direct bolt-on upgrade, designed to optimally eliminate unwanted restrictions in the factory downpipe, reduce turbo lag and enhance the exhaust note, while utilizing a 6” 400cpsi ultra high output catalytic converter which was Yeah your catless downpipe is more than likely the cause. Short & Sweet: Manufactures & People CHEAP FUCKS!. 00 each upgrade fee, not too bad, obviously down pipe needed, but still relatively cost effective. Axle back exhausts that are made well will not have a drone. Our in-house engineered 6" 400CPSI catalytic converter channels substantial flow to support upgraded engine tunes and larger turbos. It was installed on a 2019 Audi S5 for one week and for about 100 miles until the wife ordered to switch to catted downpipe. 33K subscribers in the FocusST community. Thoughts? Bull-X down pipe? - Bull-X Downpipe For Audi S4/S5 (B9) – EMD Auto 3 gaskets downpipe to manifold . com) For stage 2 I would add an upgraded downpipe/cat. 0TFSI met een catles downpipe/stg2: Vermogen: 354 Pk -> 425 Pk + 71 Pk So I bought a b9 s5 over the summer and decided I wanted to mod it. This pipe provides improved performance and airflow for a more powerful ride. Cold Start video Catless Downpipe & Resonator Delete video Catless Posted by u/grateful_newt - 16 votes and 46 comments Yes. The specialty tri-core design and precious metal Pro tip; I have the same downpipe. 0T I would for sure. From there the ARM B9 S4 Downpipe has a massive 6. Then on top of a tune, you should also get some Downpipes, that'll add extra horses. Introducing Can Auto Performance's brand new downpipe for the B9 Audi A4 2. The ARM B9 S4 catless Downpipe is one of the best upgrades for the Audi 3. 0 tfsi 354pk | s5 f5 3. View Profile Most people are cheap fucks & cut corners by getting a non-compliant CARB or EPA catless from shady Ebay Seller. Much louder than Nov 19, 2009 路 Traditional mod nomenclature is that a "test-pipe" is a piece of pipe the same size as the cat, flanged so that you can easily swap a cat in and out based on going between the street and the track. That being said if I could afford to upgrade to a B8. 0T Sportback, Audi B9 S5 Quattro 3. I am assuming it's due to the increase of back pressure. 0. 0T, Audi B9 S5 Quattro 3. Manufacturers cut corners & People buy from shady Ebay seller. A high flow or Catless downpipe without a tune will most likely reduce your horsepower a little. this is the only option I have seen that straight up says it will not cause a CEL. May 7, 2017 路 Anyone have experience with the high flow cat downpipe from carbnlabs? Seems competitively priced compared to the 034 although I may be missing something. B9 will be more refined obviously. 0T (EA839) downpipe is made to maximize exhaust flow for highest power gains. Does a catless downpipe void warranty? S5 4. Jan 31, 2023 路 Audi A5 / S5 / RS 5 - UK: Exhaust valve rattle on my b9 s5 after catless downpipe - Hello everyone, since going stage 2 I have a rattle on my exhaust (right side) at certain revs. The TIG-welded 304 stainless and investment cast body delivers addictive sound, quality finish, effortless install, reliability, and maximized performance for your turbocharged V6. 0T DOWNPIPE - 2018-2024 B9/B9. A reddit for the new Focus ST, spiritual successor to the Focus SVT. 0 TFSI 354Pk. CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3. Went with catless on my F10 535i Unfortunately if you daily the car the smell is quite unpleasant (feels like/worse than a diesel). I want to get a downpipe but don’t know which one would be efficient with the tune… does anyone have a link to buy a catless downpipe for a 2018 audi a3 2. Designed by us, German Car Accessories, aka "GCA", under our performance line GCA Performance . The 02 sensor post cat is recognizing the unburnt fuel that would usually be burned through your stock cat. 0T EA839 test pipe will make your vehicle sound like an S-car really should. 5 S4, 4M Q7, B7 S4, B8. 0TFSI met een catles downpipe/stg2: I have a Catted Downpipe on my B58 and it is a noticeable sound increase. Go nuts out and go Stage 3+ or keep it where its at now. If you can find a good downpipe (if you care about emissions) then Stage 2 is good but that’s a lot more effort to install the downpipe and pass emissions if you can’t find on with a GESI cat on it. Unlock your Audi B9’s full potential with our expertly engineered Catless Downpipe. 2017+ Audi S4 B9/B9. 2 6MT This ECS B9 S4/S5 Downpipe & Resonator Delete Kit (Mfg#016752la02KT) fits Audi B9 S4 Quattro 3. 0T. One shop offered $1400 for a 10-hour job to install the following: Intercooler, Downpipe, Intake, Drivetrain Insert Upgrades (Billet Subframe Mounts, Transmission Mount Insert, Rear Differential Mount Insert Kit). option 7. Dec 30, 2020 路 Join Date Aug 21 2017 AZ Member # 405424 My Garage B9 A4 / S4 / S5 / SQ5 Location LOS ANGELES, CA USA 18 votes, 17 comments. Do not compromise performance and sound with factory parts – unleash your B9 S4/S5 3. 0T Downpipe allows for more exhaust flow from the turbocharger which allows your 3. Engineered to elevate your driving experience, it delivers unmatched performance for an exhilarating ride. On top of all of these p CTS Turbo B9 S4/S5 3. Rear anti-sway bar for handling and feel. 00 Sale price $260. flyken74. 123 Stage 1 93 octane with full bolt ons and Stage 2 TCU is amazing. In terms of items that can be removed without leaving a traceJB4 piggy back computer, catless downpipe, intercooler for power gains. FREE SHIPPING TO LOWER 48 USA! Maximize your performance with REDSTAR EXHAUST’s downpipe for the B9 SQ5 3. MK6 Downpipe Suggestions (have XForce Catback) has a catless downpipe, the smell is hideous Feb 22, 2020 路 Today i installed a cts catless downpipe onto a 2018 audi s5, we also made a few pulls and revs. Install rates for a B9 S4 upgrade to 034Motorsport Stage 2 I'm shopping around to install 034 software and hardware in my B9 S4. for the tune i’d recommend looking into unitronic, integrated engineering, eqt, and apr, haven’t heard good things about cobb ots for the gti CTS Turbo B9 S4/S5 3. I've never heard of NVH being the reason not to go catless. I'm surprised it's still relatively quiet, but you can hear the turbo now. 0TFSI® EA839® (CWG) engine. Aside from speed their latest stage 2 update has very nice pops and bangs (if you’re into that), and they support catless downpipes which was a big one for me. A 200cell cat would also achieve a nicer sound. Dec 1, 2019 路 If you’re thinking about a downpipe install for your S5, this might help you out. Looks like a funky Y Hey guys I was looking to go stage 2 on my 2022 s5 and was wondering what the differences were between the 034 catless downpipe and the CTS catless downpipe. 0T Downpipe upgrade starts at the turbocharger where we have a precision CNC machined turbo flange to match the OEM turbo, or any turbo upgrade that fits the OEM downpipe. I had eisenmann race exhaust and catless downpipes on my M6 GC and the car had a stupid loud cold start. Unless you’re going external wastegates you have a good chance of boost creep when it gets cooold out. I will update my experience with it in a new tread. A catted pipe will still smell more than a stock DP at idle but there's less smell overall. Installed a Whoosh catless downpipe to go with the MBRP catback. 5” when it splits into 2 which provides a sharper throttle response due t Thanks for the comment, I just purchased the Ark secondary downpipe from Lap3 website (the only one available). The stock ones I have now are not catching my eyes and I love the rs5 headlights animation. Thread Tools. Cheers for the downpipe, you pay for what you get, so the more $$ you spend the better the quality. 5 S4 - Going stage 3 in the spring. Stage 2 in January when the catless downpipe arrives. 5 S4 with a 3. May 30, 2024 路 Unitronic® is proud to release its Performance Downpipe for the 2017+ Audi® S4® and S5® equipped with the 3. In addition to unleashing the power and performance of your 3. =$3k-ish Jul 5, 2018 路 The Upgrade Garage; Thread: Carbnlab catless downpipe for B9 S4 and S5. VRSF recommends using permatek exhaust sealant, and using a tube expander on the end that connects to the stock exhaust. Engineered as the ultimate downpipe solution for your Audi B9 S4 or S5, every detail has been maximized to provide the turbo and engine with a completely unrestricted exhaust flow path for up to 45HP & 41TQ. comments sorted by Best Top New Controversial Q&A Add a Comment Catless downpipes will smell of exhaust fumes more than a catted downpipe. At best, I would expect for it to stay the same or a little under. Since I got my B9 S4, i've watched 100's a videos/tutorials to mod it, eventually. All the added power comes from increase in boost. The ARM B9 3. downpipe to flex pipe and then flex pipe to mid pipe. It will make a nice difference, plus you can go stage 2 on both ECU/DSG for 100. But keep in mind you'd have to take time to remove these for a dealer visit. 0t Turbo ; 2017+ Audi S5 B9/B9. So you guys go for custom-mades muffler and add resonators to cancel the drone noise. 0T Cabriolet. There is still some smell, but significantly better compared to catless setup. Cool air Intake with stage 1 is the way to go. Would upgrade your cooling before doing any tunes and full exhaust is always nice. Basically, people with catless systems don't care about their health to breath fresh air. 0T potential! Designed using the latest in CAD technology; this part is made to fit perfectly in place of the restrictive factory catalytic converter. Nov 16, 2021 路 APR has always had a tune that eliminates my CEL from running either catless or HFC's. s4 b9 3. With a downpipe you're going to want to run a Stage 2 flash or else you'll throw an O2 code generally speaking so in terms of just straight bolt on performance you'll get some, but you won't see the true benefit to the downpipe unless you're flashing in addition to it. 0T Potential! Brand: ES#: 4043052 Mfg#: CTS-EXH-TP-0009C Upgrade your 2017+ Audi S4/S5 with our Downpipe. The factory intercooler is small and heats soaks to point of significantly increased intake air temps after 8 or so seconds of full throttle, resulting in pulling of ignition timing and reduced power. redstarexhaust. MTC Motorsport Audi S4 S5 B9 3. When in dynamic mode it goes away but I am getting conflicting answers on whether a Catless downpipe can be run prior to a tune. Mannn I been looking for a damn catless down pipe for my civic si recently found a kenji garage downpipe for a 2018 1. utehd bizcvt nggh sanein txdzj pckuj klbjtwt jtb adkszp ueotb swovy cnwe ktw nkm woruzc