BMW M135i & M140i (F20 | F21) Performance Parts & Upgrades
Performance parts for the six-cylinder, rear-wheel-drive BMW M135i and M140i hatchbacks (F20 five-door and F21 three-door), built from 2012 to 2019. With the N55 (M135i) and later B58 (M140i) turbocharged straight-six, these are some of the most tunable and fun hot hatches ever made.
M140i Suspension, Coilovers & Geometry
Power is never the problem with an M135i or M140i. Traction, body control and front-end grip are. Coilovers, lowering springs and a proper geometry setup keep the car flatter, put the power down better and make it far more confidence-inspiring when driven hard. We stock coilovers and dampers from KW, AST, MOTON and ST Suspension and Eibach lowering springs.
M140i Cooling & Intake
Heat soak is the enemy of a tuned N55 or B58. Upgrade with AIRTEC intercoolers and cooling upgrades, K&N high-flow air filters and AEM charge pipes and DryFlow filters.
M140i Exhausts & Sound
Choose from Akrapovic titanium exhaust systems and Milltek exhausts, or take full control of the factory exhaust valves with Cargraphic exhaust valve controllers.
M140i Brakes
Endless brake pads in compounds to suit fast road driving through to sustained track use.
MMX Upgrades for the M140i
Precision-engineered, UK-made MMX parts for the M140i, including hubcentric wheel spacers, billet engine bay parts and oiling, cooling and chassis upgrades.
M140i Engine & Ignition
Supporting upgrades including Mantis performance ignition coils and MOTUL engine oil to keep your straight-six healthy under hard use.
M140i Wheels & Tyres
Nankang performance tyres to complete your build.
Fitting & Geometry Setup for Your M135i or M140i
Parts are only half the story. At our workshop in Stratford-upon-Avon we fit everything we sell and finish the job with ride-height setting, corner weighting and a bespoke geometry setup tailored to how you use your M140i. It is what we are known for, and it is how you get the full benefit of every upgrade.
BMW M135i & M140i Upgrade FAQs
Do M135i and M140i parts interchange?
Chassis parts generally do, but the N55 (M135i) and B58 (M140i) engines need different intercoolers, charge pipes and intakes. Fitment is listed on every product, and if you are unsure, send us your registration and we will confirm.
What are the best first upgrades for an M140i?
Cooling and an intake are popular first steps, especially if you plan to tune. For handling, a geometry setup with springs or coilovers makes a big difference. Get in touch for a recommendation.
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