Explore CarBahn’s high-performance upgrades for the BMW F9X X3M and X4M—engineered by Steve Dinan. From plug-and-play Performance Controllers and ECU Software to cooling, filtration, and chassis parts, every product is built for precision, repeatable performance, and daily-driven reliability.
Fits 2019+ X3 M / X4 M and Competition models
Select your Stage and Tuning Method for the BMW X3M/X4M. Stage 1 delivers a big jump on stock hardware. Stage 2 Power Packages add matched cooling and intake hardware for repeatable performance on track and street, whether you choose our plug-and-play Performance Controller or ECU Software flash.
* 2021+ X3M/X4M ECU Software requires FEMTO unlock performed by a CarBahn dealer.
$995 • Plug-and-play power with no ECU unlock, fully reversible.
$995 • Dealer-installed flash calibration with CarBahn’s safe, repeatable power curve.
$2,945 • Performance Controller plus supporting cooling and intake hardware.
$2,945 • Software Power Package with matched hardware for sustained performance.
Tie the front structure together and sharpen steering feel with CarBahn’s Carbon Fiber Engine Chassis Brace Set for the BMW X3M and X4M. The brace reduces cowl and chassis flex under load, helping the front end stay planted under heavy braking, quick transitions, and high-grip tire setups.
BMW F97 X3M • F98 X4M (Incl. Competition)
Carbon fiber brace • Billet mounts
Anodized Black & Aluminum
Reduced flex • Sharper response
Unlock a deeper tone and freer-flowing exhaust on your BMW X3M/X4M. CarBahn’s stainless steel system reduces backpressure, improves response, and delivers a refined, motorsport-inspired sound that still works for daily driving and long highway trips.
$2,295
Take full control of your exhaust tone with adjustable valve operation — open, closed, or OEM logic. $595
Let the S58 breathe. Refresh your factory airboxes with high-flow replacement filters or upgrade to the carbon fiber Cold Air Intake Kit for cooler, less restrictive airflow and a motorsport look under the hood.
Dial in the perfect stance with CarBahn’s precision-machined, hub-centric spacers. Designed to push your wheels outward for a more aggressive and balanced look—without compromising ride quality or safety. Available in 12 mm and 15 mm sizes.
$115 – $125
12 mm • 15 mm
Finish the rear profile of your X3M or X4M with CarBahn carbon fiber spoilers. Both pieces are designed for OEM-quality fitment, adding down-the-road presence and a premium motorsport look without overwhelming the factory lines.
Core categories for your F9X—engines, cooling, and exhausts engineered by CarBahn.
Engines & Components
Heat Exchangers & Intercoolers
S58 Turbo Chargers
Show your speed. Shop official CarBahn gear and accessories.
Keep your performance car looking as sharp as it drives.
Performance engineered—and protected.
