OneFastShop S58 3 Inch Catless Downpipes BMW M2 M3 M4
OneFastShop S58 3 Inch Catless Downpipes BMW M2 M3 M4 G80 G82 G87
OneFastShop S58 3 Inch Catless Downpipes BMW M2 M3 M4
OneFastShop S58 3 Inch Catless Downpipes BMW M2 M3 M4 G80 G82 G87

BMW S58 3 Inch Catless Downpipes - M2 M3 M4 G80 G82 G87 2021-2026 - OneFastShop

OneFastShop SKU: S58G8XDP
Price
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Unlock the full potential of your S58 with the OneFastShop 3 inch catless downpipes. The factory catalytic converters are the biggest choke point in the twin turbo exhaust - removing both frees up real power, spools the turbos sooner, and brings out the aggressive growl the S58 was built to make. Engineered for the BMW M2 G87, M3 G80, and M4 G82 from 2021 to 2026.

Expect +30 to +50 horsepower with a supporting tune (more on big turbo builds), dramatically faster spool, and sharper throttle response. This paired set is a direct bolt-on with no cutting required, works with OEM and aftermarket cat-back exhausts, and is backed by a 1 year warranty on defects.

Specifications

Diameter 3 inch (full diameter from each turbo outlet)
Material 304 grade stainless steel, mandrel bent
Flanges CNC machined billet
Welding Hand TIG welded
Mounting Welded brackets on both pipes
Flex section Integrated on both pipes
Hardware Grade 12 mounting bolts
Configuration Paired set (twin turbo), catalytic converters removed
Engine BMW S58 twin turbo

What's in the Box

  • 2x S58 catless downpipes (driver and passenger side)
  • Grade 12 mounting hardware

Installation & Tuning Notes

Gaskets required: Two turbo-to-downpipe gaskets are required to seal these downpipes to your factory turbos. Our 3.5 Inch Turbo to Downpipe Gasket for BMW S58 is sold separately - add two to your order.

Tuning & check engine light: Removing the cats means the rear O2 sensors will eventually set a check engine light (a catalyst efficiency code such as P0420 / P0430) on an otherwise stock car. This is normal for any catless downpipe and not a fault with the part. To run them correctly and keep the light off, the car should be tuned with the rear O2 sensors turned off - any major S58 tuning platform supports this. We strongly recommend installing these downpipes with a supporting tune rather than on a stock vehicle.

Off-road use: Intended for off-road and track use only. Not legal for use on public roads and may not comply with emissions regulations. Check local laws before installation.

Fitment

Year Make Model Submodel Engine
2021-2026 BMW M3 G80 (incl. Competition) S58
2021-2026 BMW M4 G82 / G83 Convertible (incl. Competition) S58
2023-2026 BMW M2 G87 (incl. Competition) S58

Read before you buy. These guides cover fitment, what to expect, and how to install.

Shipping

  • Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
  • Standard, expedited, and overnight options at checkout.
  • Oversized items ship by freight and take longer.
  • Special order items follow a lead time we confirm with you individually before the order is committed.
  • Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
  • Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
  • International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

  • 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
  • Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
  • Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
  • Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
  • Product images may be representative. The SKU and specifications in the listing are what ships.
  • Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty
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L
Luis M.

Very clean set for the newer S58 cars. The packaging protected both pipes and the overall finish looked better than expected.

O
Omar S.

These downpipes were a good match for my G82. The installer said the layout was accurate and the install went smoothly.

V
Victor N.

Used these on a G80 M3 build and the fit was clean from the turbo side back. The welds looked even and the flanges sealed properly.

M
Miles Thompson

Did these on my G82 M4. Welds and finish are top notch. With a tune the car is a different animal, and there were no CELs once the proper coding was done.

C
Caleb Ostrowski

G80 sounds incredible with these installed. Took some time on the lift but everything went together without issues — the bracketry lined up perfectly and the welds are clean.

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