KW Street Comfort Coilover Suspension Kit for BMW 1 Series M135i & M140i (F20/F21, RWD/2WD) - Non-EDC Non-Adaptive - Height & Rebound Adjustable Comfort Ride Lowering Coilovers - Fast Road Street Shocks (1K2/1K4)

KW Street Comfort adjustable suspension for BMW 1 Series M135i and M140i, F20 F21, RWD, non adaptive

Give your BMW 1 Series the ride quality it deserves. KW Street Comfort is the premium coilover suspension that blends a supple, quiet ride with confident fast-road handling. Enjoy smoother progress on broken UK tarmac, crisper turn-in and excellent stability, plus the ability to set your stance and fine tune rebound at home. Ideal for daily-driven cars that still see spirited B-road use.

Vehicle compatibility

• BMW 1 Series M135i and M140i, rear-wheel drive, 2WD
• Chassis codes: F20, F21
• Variants: 1K2, 1K4
• For vehicles without adaptive damping, non EDC only

Ride height range

• Front: 15 to 40 mm lowering
• Rear: 20 to 45 mm lowering

Approved axle loads

• Front: 921 to 1090 kg
• Rear: up to 1230 kg

Why this kit is a winner

• 16-click rebound adjustment, tailor comfort and control in seconds
• Inox-line stainless steel bodies for corrosion resistance and long service life
• Short-body dampers preserve usable travel for comfort at lower ride heights
• Trapezoidal threading with composite spring seats for smooth, reliable height changes
• Well-defined adjustment window for the stance you want with everyday practicality
• Improved body control and steering precision on B-roads and motorways
• Great with larger wheel upgrades and low-profile tyres thanks to rebound tuning

Real-world results on UK roads

If the factory setup feels crashy or unsettled, Street Comfort calms the ride without dulling the drive. Click softer for commuting and long motorway journeys, or add a few clicks for a tighter, more controlled feel when the road opens up. Expect reduced float, better composure over crests and a planted, confidence-inspiring chassis.

Proven by us

MJ Modifications has fitted and run these on customer cars and in-house builds. Feedback is consistently positive on refinement, stability and adjustability. For daily-driven M135i and M140i models wanting a comfort-focused performance suspension, this kit is a standout choice.

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Professional fitting

Want expert installation and setup? Book your car in with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a tailored quote, ride height guidance, recommended rebound click settings and road-friendly alignment advice.