BMW S55 F8X M2/M3/M4 Catless Downpipes
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up to 8 weeks
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Description
Description
Unlock the full potential of your F8X M3 or M4 with the S55 Catless Downpipes. Designed exclusively for the BMW F80 M3, F82 M4, and F83 M4 Convertible running the S55 twin-turbo inline-six, this catless downpipe set eliminates the restrictive factory catalytic converters and the brittle OEM flex sections that BMW fitted to muffle one of the most tunable engines they've ever built. Significant power gains, faster spool, and the kind of S55 soundtrack that finally puts the rasp behind it.
Key Features:
* Catless High-Flow Design: Removes both restrictive OEM catalytic converters. Faster turbo spool, reduced backpressure, and noticeable top-end gains. Typical Stage 2 builds see 30-50 WHP and 30-50 WTQ improvements when paired with a proper tune.
* S55 Sound Transformation: Unmuffles the S55 twin-turbo six. Deeper exhaust note, pronounced overrun burbles, audible turbo spool, and the cleaner, more aggressive top-end snarl S55 owners chase. Pairs perfectly with an equal-length midpipe to eliminate the factory rasp.
* F8X Specific Engineering: Engineered exclusively for the BMW F80 M3 (2014-2018), F82 M4 Coupe (2014-2020), and F83 M4 Convertible (2014-2020) running the S55 engine. NOT compatible with F87 M2 Competition / M2 CS — those use a different chassis routing despite the shared S55 engine.
* 3" T304 Stainless Construction: Mandrel-bent piping with CNC-machined OEM flanges, hand TIG-welded throughout. Corrosion-proof, heat-tolerant, built to handle high-boost builds and sustained track use.
* Solves OEM Downpipe Failure Point: BMW's factory S55 downpipes are known for cracking at the flex section under sustained high-RPM use. This downpipe uses a reinforced flex section that handles real-world track abuse and high-power builds without failure.
* Direct OEM Flange Fitment: Bolts straight to the OEM turbo outlets and stock mid-pipe section. No cutting, no welding, no custom fabrication required.
* Stage 2 Build Foundation: Required for serious tune levels. Pairs perfectly with MHD, Bootmod3, bM3 tunes, FMIC upgrades, methanol injection, and bigger turbo conversions. The first proper step in unlocking what the S55 can really do.
IMPORTANT COMPLIANCE NOTE: Catless downpipes are designed for OFF-ROAD / TRACK USE ONLY. Removes the catalytic converters required for road registration in Australia and most international markets. NOT legal for road-registered vehicles. Will trigger check engine lights and emissions codes without proper tuning.
TUNE REQUIRED: To unlock full power potential and clear fault codes, a custom or off-the-shelf tune (MHD, Bootmod3, bM3, etc.) is required after fitment.
Will this fit my car?
Will this fit my car?
Compatible with F8X S55-powered BMW M3 and M4 models.
F80 — BMW M3 (Sedan, 2014-2018)
F80 — BMW M3 Competition (Sedan, 2016-2018)
F80 — BMW M3 CS (Sedan, 2018)
F82 — BMW M4 (Coupe, 2014-2020)
F82 — BMW M4 Competition (Coupe, 2016-2020)
F82 — BMW M4 CS (Coupe, 2017-2020)
F82 — BMW M4 GTS (Coupe, 2016)
F83 — BMW M4 Convertible (Convertible, 2014-2020)
F83 — BMW M4 Convertible Competition (Convertible, 2016-2020)
Confirm your exact chassis code, production year, and engine code (S55B30) before ordering. NOT compatible with F87 M2 Competition / M2 CS — different chassis routing despite shared S55 engine.
Delivery and Shipping
Delivery and Shipping
Our S55 downpipes are in stock & ready to ship.
BMW S55 F8X M2/M3/M4 Catless Downpipes
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Frequently Asked Questions
Return window and conditions
You've got 30 days from the day your order arrives to send it back.
Parts must be unused, uninstalled, and in original packaging with all hardware included.
Electrical components, custom-fit parts, and clearance items are final sale unless they arrived defective.
Who pays return shipping?
If the part is defective, mislabeled, or we got the order wrong, we cover return shipping and send a prepaid label.
If it's a change of mind or wrong-fit on your end, return shipping is on you.
Manufacturer warranty vs. your warranty
Every part we sell carries the manufacturer's warranty, that's anywhere from 90 days to lifetime depending on the brand, and it's listed on the product page.
On top of that, Nuro backs every order with a 30-day satisfaction guarantee. If something's wrong in those first 30 days, you deal with us, not the manufacturer.
How to file a warranty claim
Email info@nuroperformance.com with your order number, a quick description of the issue, and photos or video of the problem.
We handle the back-and-forth with the manufacturer so you don't have to chase anyone. Most claims are resolved in 7–14 business days.
Shipping costs and timeframes
Standard shipping in Australia & the USA is free, otherwise calculated at checkout based on size and zip.
Most orders ship within 1–2 business days and land at your door in 3–7 business days.
Need it faster? Expedited and overnight options are available at checkout if possible.
Do you ship internationally?
Yes, we ship to Canada, Mexico, UK, EU, and Australia.
Rates are calculated at checkout. Heads up: any duties, taxes, or customs fees charged by your country are your responsibility we can't predict or prepay those.
Though we are based in Melbourne, Australia.
Tracking info
The moment your order ships, you'll get an email with a tracking number. You can also pull tracking up anytime by logging into your account at nuroperformance.com/account.
Tracking can take up to 24 hours to start updating after shipment, that's normal.
What if my package arrives damaged?
Take photos of the box AND the part before unpacking further, then email info@nuroperformance.com within 48 hours of delivery.
We file the carrier claim, you get a replacement on the way.
Don't toss the packaging until we tell you it's clear, carriers sometimes inspect.
Payment methods
We accept all major credit cards (Visa, Mastercard, Amex, Discover), PayPal, Apple Pay, Google Pay, and Shop Pay.
Need to split it up? Afterpay is at checkout pay over 8 weeks with no impact to your credit to check eligibility.
Bulk or repeat customer discounts
Yes, every order earns recognition that can lead to discounts. Repeat customers get early access to drops and member-only discounts via email.
Buying for a shop or build series? Apply for a trade account. Email info@nuroperformance.com for tiered pricing.
How do I know if a part fits my car?
Every product page has a fitment selector pick your year, make, model, trim, and engine. If the part fits, you'll see a "Confirmed Fit" badge. Still not sure? Send us your VIN at info@nuroperformance.com and we'll verify before you check out.
Two minutes of double-checking beats a return.
What if I order the wrong part?
It happens. As long as the part is unused and in original packaging, return it within 30 days for a full refund or swap.
If our fitment guide on the site was inaccurate, we cover return shipping. If it was a wrong selection on your end, return shipping is on you.
Do you offer fitment guarantees?
Yes. If our site confirms a part fits your vehicle and it doesn't, we pay return shipping both ways and either find you the right part or give you a full refund. Just send photos showing the fit issue.
OEM vs. aftermarket, what's the difference?
OEM (Original Equipment Manufacturer) parts are made by, or for your car's factory and match the original spec.
Aftermarket parts are made by third-party companies and often offer better performance, more options, or lower prices.
We carry both, and we'll tell you straight which one makes sense for your build.
Are parts new, used, or refurbished?
Everything we sell is brand new unless the listing specifically says "used" or "refurbished."
Used and refurb items are clearly labeled and priced accordingly, no surprises.
Performance claims (HP gains, etc.) How are they measured?
Power, torque, and other performance numbers come straight from manufacturer dyno testing on the specific platform listed.
We don't make up gains or recycle marketing fluff. If the claims look too good to be true, we don't carry the part.
Do you offer installation?
We don't run a shop ourselves, but we work with trusted installers across the US & Australia.
Email us your zip code and the part you bought at info@nuroperformance.com and we'll point you to a vetted shop nearby.
Will this void my factory warranty?
Under the Magnuson-Moss Warranty Act, a dealer can't void your entire warranty just because you installed an aftermarket part.
They CAN deny coverage on a specific component if the aftermarket part directly caused the failure.
Translation: an exhaust won't void your transmission warranty, but a tune might affect your powertrain coverage.
If you're not sure, talk to your dealer before installing.
Return window and conditions
You've got 30 days from the day your order arrives to send it back.
Parts must be unused, uninstalled, and in original packaging with all hardware included.
Electrical components, custom-fit parts, and clearance items are final sale unless they arrived defective.
Who pays return shipping?
If the part is defective, mislabeled, or we got the order wrong, we cover return shipping and send a prepaid label.
If it's a change of mind or wrong-fit on your end, return shipping is on you.
Manufacturer warranty vs. your warranty
Every part we sell carries the manufacturer's warranty, that's anywhere from 90 days to lifetime depending on the brand, and it's listed on the product page.
On top of that, Nuro backs every order with a 30-day satisfaction guarantee. If something's wrong in those first 30 days, you deal with us, not the manufacturer.
How to file a warranty claim
Email info@nuroperformance.com with your order number, a quick description of the issue, and photos or video of the problem.
We handle the back-and-forth with the manufacturer so you don't have to chase anyone. Most claims are resolved in 7–14 business days.
Shipping costs and timeframes
Standard shipping in Australia & the USA is free, otherwise calculated at checkout based on size and zip.
Most orders ship within 1–2 business days and land at your door in 3–7 business days.
Need it faster? Expedited and overnight options are available at checkout if possible.
Do you ship internationally?
Yes, we ship to Canada, Mexico, UK, EU, and Australia.
Rates are calculated at checkout. Heads up: any duties, taxes, or customs fees charged by your country are your responsibility we can't predict or prepay those.
Though we are based in Melbourne, Australia.
Tracking info
The moment your order ships, you'll get an email with a tracking number. You can also pull tracking up anytime by logging into your account at nuroperformance.com/account.
Tracking can take up to 24 hours to start updating after shipment, that's normal.
What if my package arrives damaged?
Take photos of the box AND the part before unpacking further, then email info@nuroperformance.com within 48 hours of delivery.
We file the carrier claim, you get a replacement on the way.
Don't toss the packaging until we tell you it's clear, carriers sometimes inspect.
Payment methods
We accept all major credit cards (Visa, Mastercard, Amex, Discover), PayPal, Apple Pay, Google Pay, and Shop Pay.
Need to split it up? Afterpay is at checkout pay over 8 weeks with no impact to your credit to check eligibility.
Bulk or repeat customer discounts
Yes, every order earns recognition that can lead to discounts. Repeat customers get early access to drops and member-only discounts via email.
Buying for a shop or build series? Apply for a trade account. Email info@nuroperformance.com for tiered pricing.
How do I know if a part fits my car?
Every product page has a fitment selector pick your year, make, model, trim, and engine. If the part fits, you'll see a "Confirmed Fit" badge. Still not sure? Send us your VIN at info@nuroperformance.com and we'll verify before you check out.
Two minutes of double-checking beats a return.
What if I order the wrong part?
It happens. As long as the part is unused and in original packaging, return it within 30 days for a full refund or swap.
If our fitment guide on the site was inaccurate, we cover return shipping. If it was a wrong selection on your end, return shipping is on you.
Do you offer fitment guarantees?
Yes. If our site confirms a part fits your vehicle and it doesn't, we pay return shipping both ways and either find you the right part or give you a full refund. Just send photos showing the fit issue.
OEM vs. aftermarket, what's the difference?
OEM (Original Equipment Manufacturer) parts are made by, or for your car's factory and match the original spec.
Aftermarket parts are made by third-party companies and often offer better performance, more options, or lower prices.
We carry both, and we'll tell you straight which one makes sense for your build.
Are parts new, used, or refurbished?
Everything we sell is brand new unless the listing specifically says "used" or "refurbished."
Used and refurb items are clearly labeled and priced accordingly, no surprises.
Performance claims (HP gains, etc.) How are they measured?
Power, torque, and other performance numbers come straight from manufacturer dyno testing on the specific platform listed.
We don't make up gains or recycle marketing fluff. If the claims look too good to be true, we don't carry the part.
Do you offer installation?
We don't run a shop ourselves, but we work with trusted installers across the US & Australia.
Email us your zip code and the part you bought at info@nuroperformance.com and we'll point you to a vetted shop nearby.
Will this void my factory warranty?
Under the Magnuson-Moss Warranty Act, a dealer can't void your entire warranty just because you installed an aftermarket part.
They CAN deny coverage on a specific component if the aftermarket part directly caused the failure.
Translation: an exhaust won't void your transmission warranty, but a tune might affect your powertrain coverage.
If you're not sure, talk to your dealer before installing.
