KW Street Comfort Coilover Kit for BMW 6 Series E63/E64 (2003-2010) - 10-40mm Height Adjustable, 16-Click Rebound, Inox-Line Stainless - Fits 630i, 635d, 645Ci, 650i, 650Ci - Part No. 18020006

Comfort-Focused Height Adjustable Suspension for BMW 6 Series E63 and E64

Give your 6 Series the ride quality it deserves with this KW Street Comfort adjustable damper and spring set. Built for daily use on UK roads, it smooths out rough tarmac while tightening body control for confident, effortless cruising. Perfect if you want a refined grand tourer feel with a tasteful drop and precise handling.

Part number: 18020006

What you will love

• Ride height adjustment of approximately 10 to 40 mm for a purposeful stance and real-world usability
• 16-stage rebound tuning to fine-tune compliance and stability to your preference
• Inox-Line stainless bodies for excellent corrosion resistance in British weather and winter road salt
• Comfort-biased spring and damper rates that reduce harshness without losing control
• Trapezoid thread and composite spring perch for smooth, long-term height adjustment
• Part approval (§19.3) and premium materials engineered to last

Real improvements you can feel

Set the rebound firmer for motorway stability and reduced float, or soften for plush town driving. The 16-click adjuster makes it easy to tailor the character for B-roads, long trips and larger wheel setups. Expect calmer vertical movement, less pitch and roll, and a more composed, grown-up ride that suits the 6 Series perfectly.

Lowering range and build quality

Dial in a subtle drop from roughly 10 mm to 40 mm to balance clearance and aesthetics. The Inox-Line stainless construction resists rust, the thread remains easy to turn year after year, and the overall finish is built for tough UK conditions.

Compatibility

BMW 6 Series E63 Coupé and E64 Convertible, model years around 2003 to 2010:

• 630i
• 635d
• 645Ci
• 650i
• 650Ci

If you are unsure on fitment, get in touch and we will help you confirm before ordering.

Proven by us and our customers

We have installed this KW Street Comfort setup on multiple E63 and E64 cars. Feedback is consistently positive: quieter bump absorption, better composure on uneven surfaces and a confident, planted feel at speed. It enhances the GT character while keeping the car enjoyable every day.

Documents

• Parts Approval
• Installation Instruction
• Adjustment Manual

Warranty

• Street Comfort, Variant 1, Variant 2, Variant 3: Limited Lifetime Warranty
• Bushings, bump stops and ball joints: 1 year
• Clubsport, 2-way Race, 3-way Race: No warranty

Fitting and setup

For professional installation, alignment and a tailored setup, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Search-friendly terms

BMW 6 Series suspension upgrade E63 E64, adjustable shocks BMW 6 Series, rebound adjustable shocks 16 clicks, comfort suspension kit UK, lowering shocks and springs 10 to 40 mm, stainless damper kit Inox-Line, BMW 630i 635d 645Ci 650i 650Ci ride height kit, grand tourer suspension, B-road compliant suspension, motorway stable suspension, corrosion resistant suspension for UK roads, KW Suspension part no 18020006.