Öhlins Road & Track Coilover Suspension – BMW 3-Series / M3 (E46) BMS MI30S1

Öhlins Road & Track Coilover Suspension – BMW 3-Series / M3 (E46) BMS MI30S1

Part Number: BMS MI30S1 | Chassis Code: E46 | Fitment: BMW 3-Series (E46) 1998–2005 & BMW M3 (E46) 2000–2005

Over 40 years of motorsport engineering distilled into a street-ready coilover kit. The Öhlins Road & Track series delivers a genuine racing experience without sacrificing daily drivability — thanks to Öhlins' proprietary Dual Flow Valve (DFV) technology. Featuring separate compression and rebound damping adjustment, individual ride height adjustment, and an upside-down McPherson front strut, this kit unlocks the true potential of the E46 chassis. Springs are included. Corrosion-tested to ISO 9227 and backed by a 2-year limited warranty.

Vehicle Fitment

Note: For non-M models, original BMW M3 top mounts are required.

Technical Specifications

General Features

• DFV technology (Dual Flow Valve) — Öhlins' proprietary damping system
• Individual height adjustment
• Rebuildable dampers for custom tuning
• Corrosion salt spray tested (ISO 9227)
• 2-year limited warranty
• Front & rear springs included

Front Features

• McPherson strut — upside-down design
• Compression and rebound damping with single adjuster
• Spring preload adjuster
• Separate ride height adjustment
• Approx. 15–35mm lower than standard (recommended setup)
• Spring rate: 70 N/mm — included
• Use with original top mounts (see note re. M3)

Rear Features

• Conventional shock absorber
• Compression and rebound damping with single adjuster
• Spring preload adjuster
• Separate ride height adjustment
• Approx. 5–30mm lower than standard (recommended setup)
• Spring rate: 110 N/mm — included
• Use with original top mounts

Purchased Parts Package Includes

• Coilover kit including springs and mounting parts
• C-Spanner (for spring preload adjustment)
• Owner's manual and mounting instructions
• Sticker set

What is DFV (Dual Flow Valve)?

DFV is Öhlins' proprietary damping technology that sets the Road & Track range apart from conventional coilovers. The dual flow valve provides consistent damping characteristics on both compression and rebound strokes — the damper fluid follows a consistent flow path in both directions. This means the wheel and tyre can rapidly return to the road surface after a bump, maximising grip and traction at all times.

Because DFV opens more quickly on minor road imperfections, ride comfort is surprisingly supple — more akin to an OEM strut than a typical coilover. Over undulating surfaces, the compliance of the R&T units allows the car to crest bumps and potholes while remaining stable and in control.

Why Öhlins Road & Track?

• ✅ Over 40 years of motorsport engineering heritage — trusted by factory race teams worldwide
• ✅ DFV technology — genuine race-car response with OEM-level daily comfort
• ✅ Upside-down McPherson front strut — reduced unsprung mass, sharper response
• ✅ Separate ride height and spring preload adjustment — front & rear
• ✅ Rebuildable, ISO 9227 corrosion-tested, 2-year limited warranty