Evolution Racewerks Competition Mid Pipes – BMW X3M / X4M (F97 / F98, S58)

OVERVIEW

Evolution Racewerks Competition Series Mid Pipes replace the factory resonated mid section on the 2020 and newer BMW X3M and X4M with the twin-turbo S58 engine. The factory resonators are there to quiet the exhaust, but they restrict flow. Deleting them and running mandrel bent 2.75" (70mm) tubing improves exhaust flow, raises the power curve, brings torque in earlier and gives the car a more aggressive exhaust note.

The set uses an "H" style crossover to equalise pressure between the left and right banks. Evolution Racewerks tested both "X" and "H" designs and found the "H" reduced droning and improved low end torque compared with the "X", which is also the layout BMW used on the factory mid pipe.

Construction is 100% 304 grade stainless steel, TIG welded in house and built in the USA, with CNC precision cut billet stainless exhaust flanges. The factory bracket hanger is retained, the laser cut hanger is TIG welded with stainless rod, and high quality exhaust clamps join the mid pipes to the rear muffler section. The pipes fit the factory exhaust or any aftermarket exhaust designed to work with the factory mid pipes.

SPECS

• Mandrel bent 2.75" (70mm) piping through the full mid section
• Deletes the factory resonators for improved flow
• "H" style crossover for pressure equalisation, reduced drone and better low end torque
• 100% 304 grade stainless steel construction
• 100% TIG welded, built in the USA by in-house fabricators
• Precision CNC machined billet stainless steel flanges
• Retains the factory bracket hanger; laser cut hanger TIG welded with stainless rod
• High quality exhaust clamps for the connection to the rear muffler section
• Finish: brushed
• Higher maximum horsepower curve and higher initial torque curve
• Improved throttle response and faster turbo spool up
• Ease of installation: 1 on Evolution Racewerks' 1 (easy) to 5 (hard) scale
• Compatible with the factory or aftermarket exhaust systems
• Track tested durability
• Limited Lifetime Warranty

PARTS INCLUDED

• Competition Series "H" crossover mid pipe section
• Exhaust clamps for the rear muffler connection
• All hardware required for complete installation

TECH RESOURCES

Additional Parts Required

• None. Evolution Racewerks specifies no additional hardware for these mid pipes; the factory bracket hanger is reused and all installation hardware is supplied.
• Optional companion part: Evolution Racewerks Competition Series Catless Downpipes X3M / X4M S58.
• Installer supplies normal hand tools, a vehicle lift or stands, and penetrating oil for the factory exhaust fasteners.

Installation

• Evolution Racewerks does not publish a downloadable installation guide or parts checklist for these mid pipes. Installation is rated 1 out of 5 for difficulty and replaces the factory resonated mid pipes using the supplied clamps and hardware.
• Contact Speed Logic if you need installation support or a recommended installer.

PART NUMBER

• BM-EXH025MIDH — Competition Series "H" crossover mid pipes, brushed finish
• Evolution Racewerks lists this part on its own site as BM-EXH025S-MIDH.

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