KW Variant 3 V3 Coilovers Suspension Kit for BMW 6 Series E63 E64 (2004+) Coupe & Convertible - inox-line Stainless, Height & Rebound/Compression Adjustable, Performance Lowering Shocks/Dampers - Part 663C

BMW 6 Series E63 E64 Performance Coilover Suspension Kit by KW Variant 3 inox-line — Part No. 663C

Unlock sharper handling, a lower centre of gravity and real adjustability with this premium coilover suspension kit for the BMW 6 Series E63 Coupe and E64 Cabrio from 01/2004 onwards. The KW Variant 3 inox-line package brings double-adjustable damping, precise ride height control and stainless construction for year-round road use. Ideal for fast road driving and occasional circuit work, this is the go-to upgrade for anyone chasing confident turn-in, reduced body roll and a purposeful stance.

Looking for a BMW 6 Series suspension upgrade, E63 E64 lowering kit, adjustable shocks for 6 Series, height adjustable dampers, stainless strut coilovers or a road and track ready damper kit for your 6er? This V3 system delivers the balance, grip and comfort enthusiasts demand.

Why this KW Variant 3 inox-line kit stands out

• Independent damping control — 16 clicks on rebound and 12 clicks on compression for repeatable, dialled-in chassis tuning
• Ride height adjustment — set the stance and rake to suit your wheels and tyres while optimising geometry
• Inox-line stainless steel strut bodies — corrosion resistant for long-term UK road use
• Twin-tube damper design with motorsport-derived valve technology for consistent performance
• Composite spring seats and KW trapezoid thread for smooth, dependable height adjustment
• Engineered and validated on KW’s test rig and proven on demanding tracks

Real-world gains you can feel

We run this kit on our own builds and our customers love it. Expect crisper steering response, flatter cornering, better high-speed stability and a calmer ride on rougher tarmac once correctly set up. Whether you want a fast-road alignment, a confident setup for the odd track day or a refined daily with a tasteful drop, this delivers.

Fitment and core specs

• Vehicle: BMW 6 Series E63 Coupe and E64 Cabrio — 01/2004 onwards
• Part number: 663C
• Lowering range: Front 10 to 40 mm, Rear 20 to 50 mm
• Max axle load: Front 1100 kg, Rear 1270 kg
• Damping: Independently adjustable rebound and compression
• Adjustment range: 16 clicks rebound, 12 clicks compression
• Construction: Twin-tube dampers, inox-line stainless bodies, composite adjuster collars

Tunable comfort and control

Separate low-speed rebound and compression tuning lets you fine-tune pitch, roll and vertical control without changing springs. So you can enhance steering precision, traction and mid-corner balance for your road conditions and tyre setup. The compression adjuster is positioned for easy access, making track-to-road changes quick and simple.

Built to last

Each unit is quality tested and designed for durability. The inox-line stainless finish resists corrosion, helping the kit perform consistently through British winters and daily use.

Perfect for drivers who want

• A premium coilover kit for BMW 6 Series with genuine adjustability
• Improved grip, stability and control without sacrificing ride quality
• A clean, functional drop and a precise stance

Professional fitting and setup

For installation, alignment and a tailored fast-road or track-day setup, choose MJ Modifications in Warwickshire. Request a quote and setup advice at info@mjmodifications.co.uk.

Search-friendly summary

BMW E63 E64 coilover suspension kit, adjustable shocks for BMW 6 Series, performance lowering kit, stainless strut coilovers, ride height adjustable suspension, fast road suspension, track day damper kit, twin-tube adjustable dampers, rebound and compression clicks, corrosion resistant coilovers, KW Variant 3 inox-line, Part No. 663C.