BJG Race Downpipes: BMW X3M/X4M F97/F98 - Stainless Steel

Give the S58 a freer path out of the turbos with BJG Race Downpipes for the BMW F97 X3M and F98 X4M. This stainless-steel pair replaces the factory downpipe sections with a focused, low-restriction race configuration, bringing a sharper exhaust note and more pronounced turbo character to a properly calibrated build.

Sound and Performance
Reduced restriction immediately downstream of the turbochargers supports exhaust flow and the response of a matched performance tune. Expect a more assertive sound under load, with the final volume and tone shaped by your midpipe and rear exhaust. Power gains depend on calibration, fuel, boost targets, and the rest of the vehicle setup; a specific horsepower increase is not guaranteed.

Construction
Stainless-steel pipework with welded sensor ports, flanged connections, and braided flex sections. Supplied as a two-pipe set without external heat shields. This listing is for the downpipes only; no midpipe, rear exhaust, or midpipe support bracket is included.

Fitment
BMW X3M F97 and X4M F98 with the S58 twin-turbo engine. Not for X3/X4 M40i or other non-M models. Confirm model year, market specification, and connections before ordering.

Installation and Tuning
Matching ECU tuning is required. Professional installation is recommended to check sensor routing, sealing, alignment, and heat clearance. Tuning and installation are not included.

Competition Use
For dedicated competition vehicles only, where permitted by law. Not for public-road use. These race downpipes replace the factory catalytic-converter sections and are not emissions-certified.