OneFastShop S58 Catless Downpipes BMW X3M F97 X4M F98

BMW S58 3 Inch Catless Downpipes - X3M F97 X4M F98 2019-2026 - OneFastShop

OneFastShop SKU: S58XMDP
Price
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Unlock the full potential of your S58 X3M or X4M with the OneFastShop 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 these SUVs were built to make. Designed specifically for the F97 X3M and F98 X4M from 2019 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

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 (X3M F97 and X4M F98)

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
2020-2026 BMW X3M F97 (incl. Competition) S58
2020-2026 BMW X4M F98 (incl. Competition) S58

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
  • 5 stars: 4 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
Jason E.

Good upgrade for the S58 SUV platform. Once installed, the sound was sharper and the response felt stronger under throttle.

B
Brian T.

The pipes looked well made and matched the factory connection points nicely. Shipping was quick and everything arrived protected.

S
Samir K.

Installed these on an X3M and the fitment was on point. The shop did not run into clearance issues around the tight areas.

B
Brandon McCabe

Limited options out there for the X3M, and these are top quality. Power gains felt great with a tune, and the sound is mean without being intolerable on the highway.

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