Product Details
The Cusco Sport X Coilovers for the 2015-2021 Subaru WRX STI (VAF) represent the pinnacle of Cusco suspension technology, delivering 3-way damping adjustment with separate rebound, high-speed compression, and low-speed compression control via an external reservoir tank. With 14 Kg/mm front and 16 Kg/mm rear spring rates, pillow ball mounts, and custom built-to-order manufacturing, these WRX STI coilovers are engineered for professional motorsport.
The external reservoir dramatically increases oil volume and heat dissipation, essential for endurance racing where the EJ25T's sustained output and cornering loads push internal-reservoir designs past their thermal limits. Separate high-speed and low-speed compression circuits address the STI's unique challenge of managing both aggressive kerb strikes and sustained lateral loading independently of rebound tuning. Custom built-to-order with a 10-12 week lead time. For WRX STI owners competing at the professional level who need Cusco coilovers with the ultimate adjustability, the Sport X is the no-compromise choice.
Features
- 3-Way damping adjustment (rebound + hi/lo compression)
- External reservoir tank
- Monotube shock absorber with high-pressure nitrogen
- Pillow ball upper mounts
- Full-length adjustable threaded cases
- Custom built-to-order (10-12 weeks)
- Made in Japan
Specifications
| Part Number | 6A1 64X CP |
| Part Name | Cusco Sport X Coilovers |
| Vehicle | 2015-2021 Subaru WRX STI |
| Chassis Code | VAF |
| Engine | EJ25T |
| Drivetrain | AWD |
| Damping Adjustment | 3-Way (24 levels) |
| Ride-Height Adjustable | Yes |
| Spring Rate - Front | 14 Kg/mm |
| Spring Rate - Rear | 16 Kg/mm |
| Camber Plates - Front | Yes (Pillow Ball) |
| Camber Plates - Rear | No |
| Notes | WRX STI 4-door sedan; custom built-to-order (10-12 weeks) |
Vehicle Fitment
- 2015 Subaru WRX STI (VAF)
- 2016 Subaru WRX STI (VAF)
- 2017 Subaru WRX STI (VAF)
- 2018 Subaru WRX STI (VAF)
- 2019 Subaru WRX STI (VAF)
- 2020 Subaru WRX STI (VAF)
- 2021 Subaru WRX STI (VAF)