Product Details
The Riaction GT1 Coilovers for the 1975-1989 Porsche 911 Turbo deliver a premium, adjustable suspension upgrade built for drivers who want more from their 911 Turbo than the factory setup can offer. These Porsche 911 Turbo coilovers are engineered to pair street comfort with canyon and track capability, giving you the stance, handling, and adjustability you've been chasing without compromising daily driveability.
Every GT1 set features a monotube damper with 32 levels of damping adjustment, so you can tune ride quality to match the road, the weather, or your driving mood. Full-length ride-height adjustment separates preload from ride height — meaning you can drop the 911 Turbo to the height you want while preserving spring travel and shock stroke. Riaction coilovers for the 1975-1989 Porsche 911 Turbo are fully rebuildable and backed by a 2-year warranty, making the GT1 a long-term suspension investment rather than a disposable upgrade.
GT1 Series Technology
- Monotube linear damper with seamless 52mm electroplated carbon steel body
- 32-level damping adjustment (1-Way)
- 44mm CNC-machined 6061 aluminum high-flow piston
- 20mm piston rod for MacPherson applications / 14mm for non-MacPherson
- SAE9254 cold-wound linear main springs
- Multi-thickness valving shims for consistent damping
- Polyurethane oil seals and 7.5W suspension fluid
- Low-gas-pressure design for improved compliance
- Fully rebuildable — built to be serviced, not replaced
Features
- Full-length ride-height adjustment (preload-independent)
- 32 levels of damping adjustment
- Optional Swift Springs upgrade (sold separately)
- 2-year limited warranty
Specifications
| Part Number | PS-014-SS |
| Part Name | Riaction GT1 Coilovers |
| Vehicle | 1975-1989 Porsche 911 Turbo |
| Adjustment Type | 1-Way |
| Ride-Height Adjustable | Yes |
| Spring Rate - Front | 8 Kg/mm |
| Spring Rate - Rear | 4 Kg/mm |
| Top Mounts - Front | OEM |
| Top Mounts - Rear | OEM |
| Camber Plates - Front | No |
| Camber Plates - Rear | No |
| Suspension Design - Front | True Coilover |
| Suspension Design - Rear |
Vehicle Fitment
- 1975 Porsche 911 Turbo
- 1976 Porsche 911 Turbo
- 1977 Porsche 911 Turbo
- 1978 Porsche 911 Turbo
- 1979 Porsche 911 Turbo
- 1980 Porsche 911 Turbo
- 1981 Porsche 911 Turbo
- 1982 Porsche 911 Turbo
- 1983 Porsche 911 Turbo
- 1984 Porsche 911 Turbo
- 1985 Porsche 911 Turbo
- 1986 Porsche 911 Turbo
- 1987 Porsche 911 Turbo
- 1988 Porsche 911 Turbo
- 1989 Porsche 911 Turbo