M135i LCI (F20 & F21) ENGINE & PERFORMANCE

R44 Performance lists 107 engine performance parts for the BMW M135i LCI (F20/F21), including intakes & air filters, ECU tuning & flash tools, charge pipes & turbo inlets and intercoolers & charge coolers. Brands include MMX, Genuine BMW, R44 Kits, Ramair, Airtec, CSF, and every part is listed for the M135i LCI (F20/F21) – check each product page for body style and model-year fitment.

For most turbocharged cars, the best first upgrades are an ECU tune and an intake, followed by cooling upgrades such as a charge pipe and intercooler. Each supports the next, so decide on your goals first – our team can suggest a setup based on how you use your car.

Bolt-on parts like intakes can usually be fitted on their own, but bigger changes – such as downpipes, larger intercoolers, fuel system or turbo upgrades – normally need a matching ECU tune to run safely and make full use of the hardware. Check each product page or ask our team.

Modifications can affect manufacturer warranty cover and must be declared to your insurer. If your M135i LCI (F20/F21) is still under warranty, check with the manufacturer or dealer first, and speak to your insurer before fitting.

Yes. Our technicians fit engine performance parts at R44 HQ in Wembley, London – contact our team for a quote and availability. We also deliver across the UK and worldwide if you'd rather use your own fitter.