YCW Reference Series Coilovers for BMW 3 Series E90 E91 E92 E93 (E9x Non-M) 320i 325i 330i 335i 6K/18K, Height Adjustable, Camber/Caster Plates, 7-Way Rebound, Swift Springs

YCW Reference Series suspension kit for BMW 3 Series E90 E91 E92 E93 - E9x non-M - 320i 325i 330i 335i

Serious about road feel, stance and confidence on UK roads? This YCW Reference Series coilover package is the proven upgrade for the E9x chassis. With 6 kg/mm front and 18 kg/mm rear Swift linear coils, height control and seven-position rebound tuning, it delivers crisp turn-in, flatter cornering and daily comfort without compromise. A genuine performance step above entry-level options, built with premium materials and engineered to last.

We run these on our own cars at MJ Modifications and our customers have been delighted with the balance, ride quality and grip. If you are searching for a BMW 3 Series handling upgrade, E90 lowering kit, E92 adjustable shocks, E91 estate suspension or E93 cabriolet suspension kit, this is the bolt-on solution that works on British B-roads and at track days.

Highlights

• Ride height adjustment via fully threaded bodies for the perfect stance and corner balance
• Seven-position rebound control to fine tune comfort and body control for street or circuit
• Adjustable top mounts with camber and caster settings to sharpen turn-in and optimise tyre wear
• Swift linear coils, 6 kg/mm front and 18 kg/mm rear, matched for fast-road stability and traction
• Overbuilt for durability and safety with long-term serviceability

Construction and components

• Forged 6061-T6 hard-anodised aluminium front upper mounts
• High-tensile carbon steel camber and caster plates with anti-slip finish
• Oversized PTFE-lined Japanese spherical bearing for precise steering feedback
• Forged 6061-T6 hard-anodised upper spring perch with sealed Japanese radial bearing
• 65 mm ID cold-wound Japanese HS5.TW steel linear springs by Swift
• OEM-balanced spring rates for predictable behaviour and grip
• 52 mm OD cold-drawn Japanese SAE 1020 seamless carbon steel damper body
• Black-zinc plated fully threaded body tested to 250 hours salt spray for corrosion resistance
• Forged SAE 4140 chromoly piston rod with ceramic rod guide
• Seven-step rebound adjuster to tailor damping to tyres and conditions
• 44 mm OD forged 7075-T6 hard-anodised aluminium Double-Digressive-Blow-Off piston for bump control and high-speed stability
• Silkolene PRO RSF VI-460 damper oil and Viton performance O-rings for consistent performance
• Forged 6061-T6 hard-anodised lower spring perch with locking collar
• Fully threaded forged 6061-T6 hard-anodised or high-tensile carbon steel lower mount
• Silicone lower mount end caps where applicable
• Weather-resistant neoprene shock covers
• Fully rebuildable for long-term ownership

Fitment

BMW 3 Series E90 saloon, E91 Touring, E92 coupé, E93 convertible - non-M models - 320i, 325i, 330i, 335i.

Real-world results

• Smoother high-speed stability and confidence on uneven tarmac thanks to the DBO piston and premium damper oil
• Reduced body roll, squat and dive for a planted feel
• Sharper steering response from camber and caster adjustable top mounts
• Road-friendly ride with the control you want for spirited driving and occasional track work

Why enthusiasts choose this kit

Used and recommended by the MJ Modifications team, with consistently positive feedback from owners who daily drive their E9x and enjoy weekend blasts. The adjustability, build quality and support make it a standout suspension upgrade for year-round UK use.

Installation and alignment

Professional installation and geometry setup are strongly advised to maximise handling and tyre life. For expert fitting, corner weighting and alignment, choose MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Warranty and aftercare

Lifetime warranty on hard parts and 1 year on wear items, backed by technical support and servicing.

Pre-dispatch compatibility check

We verify fitment before shipping. Add your UK registration or the last 7 digits of your VIN at checkout so we can confirm you receive the correct E9x kit.

Part number

YCW-REF-E92

Manufactured by

YCW Engineering

Search terms customers use

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