The F20 (5-door) and F21 (3-door) BMW M135i remains one of the most celebrated rear-wheel-drive hot hatches ever produced. Powered by the potent 3.0-litre turbocharged N55 inline-six engine and paired with either an engaging 6-speed manual or a rapid 8-speed ZF8 automatic transmission, this platform delivers unmatched straight-line punch and dynamic driving engagement. JXL Performance is your ultimate hub for premium tuning hardware to push this N55 platform to its absolute limits.

Explore our complete range of BMW M135i performance upgrades by category: To extract massive horsepower and amplify the straight-six exhaust note, optimize your airflow and thermal management with our Intake and Cooling ranges, alongside high-flow Exhaust systems and uprated Turbocharger hardware. For immediate power increases, utilize our Fuel/Ignition upgrades and prepare for extreme power levels with our Engine Build forged internals. To harness power through the rear wheels and sharpen chassis dynamics, browse our comprehensive Drivetrain, Suspension, and Wheels/Spacers offerings, while maintaining fade-free stopping power with our recommended Brakes section. Finally, enhance your car's aggressive stance with premium Exterior aero and supportive Interior upgrades, while keeping your N55 motor running at its peak with our OEM-spec Service Parts. Alternatively, you can browse our entire catalog of upgrades in the Shop All Parts collection.