KW Clubsport 3-Way Coilover Kit for BMW 1 Series M135i (F20/F21) xDrive 4WD 01/2015+ | Height Adjustable Track Suspension | Chassis 1K2, 1K4

Triple-adjustable track suspension for BMW M135i xDrive F20 F21

Chasing quicker laps and sharper road manners on your all wheel drive 1 Series hot hatch? This tri-way adjustable coilover package delivers motorsport-grade control for the BMW M135i F20 and F21 xDrive, 01/2015 onward. Built for drivers who want precise damping control, real-world durability and a wide ride-height window, it is the go-to upgrade for serious track day enthusiasts and fast-road owners alike.

Why this kit stands out

• Three-way damping adjustability for ultimate chassis control: independent rebound, low-speed compression and high-speed compression.
• Remote reservoir compression circuits for consistent performance on long stints and bumpy circuits.
• Height adjustable for stance and corner-weighting within a tested range for the F20 and F21 platform.
• Developed on demanding circuits including the Nurburgring Nordschleife for grip, stability and confidence at speed.
• Road usable with track-ready precision. Dial it soft for daily use, firm it up for sprint, time attack or open pit lane events.
• High quality components engineered for longevity and repeatable setup changes.
• We have installed and run these on customer cars. Feedback is consistently excellent for turn-in bite, traction off slow corners and braking stability.

Damping adjustment

• Rebound: 16 clicks for balance, ride quality and mid-corner control.
• Compression via separate reservoir:
  • Low-speed compression: 6 clicks for pitch, roll and platform support.
  • High-speed compression: 14 clicks for kerb strikes and rough surfaces.
• Independent circuits inspired by competition-proven technology for precise, repeatable tuning.

Lowering range

• Front: 30 to 55 mm
• Rear: 30 to 55 mm

Permitted axle loads

• Front: 1001 to 1020 kg
• Rear: up to 1120 kg

Fitment

BMW 1 Series M135i F20 and F21 xDrive AWD, from 01/2015 onward. Chassis codes: 1K2 and 1K4.

Who is it for

If you want a BMW M135i suspension upgrade that combines race-car response with daily road refinement, this is it. Ideal for track days, time attack, hill climb, fast B-road blasts and drivers who want accurate damping control to match tyre choice and circuit conditions.

Key features at a glance

• Independent rebound, low-speed and high-speed compression adjustment.
• Continuous ride-height adjustment within a verified range for F20 and F21.
• Optional solid top mounts on certain applications for added precision. Contact us to confirm for your vehicle.
• Supplied with part certificate and built to a high OEM-grade standard.

Fitting and setup

Professional installation, four-wheel alignment and corner-weighting are strongly recommended to unlock the full performance of this package. MJ Modifications offers fitting, geometry and setup in Warwickshire. Request a quote at info@mjmodifications.co.uk.

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Note: Adjustable camber top mounts are optional on certain models. For compatibility guidance, recommended spring settings or baseline track and road setups, get in touch with our team.