BMW E90/E92 xDrive Coilovers - YCW Reference Series 6K/18K Swift Springs, Height Adjustable, Camber/Caster Plates, Rebuildable, Lifetime Warranty (YCW-REF-E92X)

Reference Series Height Adjustable Suspension for BMW 3 Series E90 E92 xDrive with Swift Springs

Unlock sharper steering response, stronger mechanical grip and a genuinely comfortable ride on UK roads with this YCW Reference Series suspension kit for the E90 and E92 xDrive platform. Tuned for fast-road use with the control you want for the odd track day, it delivers precise chassis control without the crashy feel of cheaper alternatives. We run this package on our own builds and customer cars and the feedback has been consistently positive for ride quality, confidence and real-world pace.

If you are looking for a lowering solution for BMW 3 Series AWD models that balances performance and daily usability, this is the intelligently engineered choice. Height adjustment for stance and corner-weighting, camber and caster adjustment up front, premium Swift linear springs and fully serviceable dampers make it a compelling upgrade for E90 E92 xi drivers.

Why this kit stands out

• Ride height adjustable for stance, clearance and balance
• Front top mounts with camber and caster adjustment to set geometry correctly
• Swift linear springs 6K front and 18K rear for predictable control and composure
• Seven-step rebound adjustment to fine tune damping
• Digressive DBO piston for support in quick transitions and compliance on rough surfaces
• Corrosion protection and weather guards suited to UK conditions
• Fully rebuildable for long-term value and serviceability
• Lifetime warranty on hard parts with 1 year on wear items for peace of mind

Construction and materials

• Forged 6061-T6 hard anodised aluminium front upper mounts
• High-tensile steel camber and caster plates with anti-slip coating
• Oversized PTFE-lined Japanese spherical upper mount bushing
• Forged 6061-T6 hard anodised upper spring perches with sealed Japanese radial bearings
• 65 mm ID cold-wound Japanese HS5.TW steel linear Swift springs, 6K front and 18K rear
• 52 mm OD cold-drawn Japanese SAE 1020 seamless carbon steel damper bodies
• Black zinc-plated fully threaded bodies tested for 250 hours salt spray resistance
• Forged SAE 4140 chromoly piston rods with ceramic piston rod guides
• 44 mm OD forged 7075-T6 hard anodised aluminium double-digressive blow-off piston
• Silkolene PRO RSF VI-460 damper oil with Viton performance O-rings
• Forged 6061-T6 hard anodised lower spring perch locking collars
• Forged 6061-T6 hard anodised or high-tensile carbon steel lower mounts
• Silicone end caps on lower mounts where applicable
• Weather-resistant neoprene shock covers

How it improves your E90 E92 xDrive

• Firmer, more accurate turn-in with reduced body movement
• Enhanced traction and stability for B-roads, wet commutes and motorway miles
• Better braking stability and confidence over uneven surfaces
• Geometry adjustability for tyre wear optimisation and track-day setup
• Refined ride comfort from linear springs and digressive valving

Fitment

For BMW 3 Series E90 and E92 xDrive models including 328xi, 330xi and 335xi AWD variants.

Compatibility check before dispatch

We will verify fitment prior to shipping. Add your UK registration or the last 7 digits of your VIN at checkout so we can confirm the correct kit for your car.

Professional installation

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

Manufacturer and warranty

Manufacturer: YCW Engineering

Warranty: Lifetime warranty on hard parts and 1 year on wear parts.

Part number

YCW-REF-E92X

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