Ohlins G29 Z4 / A9X GR Supra Coilover Suspension - Road & Track
The Öhlins Road & Track Coilover Suspension (TOS MU00S1) is engineered for the BMW Z4 (G29) and Toyota GR Supra (A90) — two platform-sharing sports cars that deliver exceptional driving dynamics from the factory. Built around Öhlins' Dual Flow Valve (DFV) technology, this system provides exceptional control over both compression and rebound damping, allowing the suspension to respond accurately to the demands of both spirited road driving and dedicated circuit use while maintaining consistent tire contact throughout.
Unlike conventional damper designs, the DFV system manages fluid flow across the full range of shaft speeds. At low shaft speeds, fluid passes through the bleed circuit for controlled, compliant damping. As shaft speed increases, flow transitions through the piston ports, and under high load or sudden impacts, the DFV opens to allow additional flow. This results in improved bump absorption, increased traction, and reduced harshness — building on the already strong chassis foundation shared between the Z4 and GR Supra platforms.
Öhlins compensates for heat-induced changes in fluid viscosity using a temperature-reactive needle bleed valve, which adjusts flow as damper temperatures rise during extended track use. This ensures consistent, predictable handling from street driving through sustained circuit sessions, providing the repeatability that drivers and instructors rely on when pushing these platforms at speed.
Ride height adjustment is handled independently from spring preload through a threaded lower mount design. This allows precise lowering without altering spring characteristics or reducing suspension travel, preserving the engineered balance of the system and the natural handling character of the G29 and A90 platforms.
Product Details
- SKU: TOS MU00S1
- Öhlins Dual Flow Valve (DFV) technology
- Single external adjuster with 25 clicks controlling compression and rebound (1-way)
- Lowering range: 0–25mm front, 0–25mm rear
- Spring rates: 90 N/mm front, 160 N/mm rear
- Separate ride height adjustment independent of spring preload
- Monotube damper construction
- Rebuildable and serviceable dampers
- Designed for both street and track use
Front Suspension Features
- McPherson strut design with inverted monotube construction
- Spring preload adjustment
- Separate damper length adjustment for ride height
- Compatible with factory top mounts
Rear Suspension Features
- Aluminum monotube shock absorber
- Spring preload adjustment
- Independent ride height adjustment
- Compatible with factory top mounts
Vehicle Applications
- BMW Z4 (G29)
- Toyota GR Supra (A90)
Technical Resources
Notes
- Suspension components are non-returnable once installed
- Vehicles equipped with factory electronic dampers require the Öhlins cancellation kit (part no. 35020-30) to eliminate dashboard warning lights when installing this coilover system — verify your vehicle's configuration before ordering