The Cusco Sport TN-S Coilovers for the 2015-2021 Subaru WRX STI (VAF) give you independent 24-level compression and rebound damping control with 576 possible combinations, delivering motorsport-level tunability you can still live with every day. With monotube construction, 8 Kg/mm front and rear spring rates, and rubber upper mounts for street comfort, these WRX STI coilovers handle both commuting and track days.
The VAF STI lives a dual life, and the Sport TN-S”s independent compression and rebound circuits let you optimize for both roles. Dial back compression for compliant street riding over rough pavement, then stiffen both circuits for HPDE events where the EJ25T”s torque demands control. Rubber upper mounts preserve cabin refinement for the commute. For WRX STI owners who want Cusco coilovers with competition-level adjustability that still fits within racing regulations prohibiting external reservoirs, the TN-S is the precision choice.
Features
Specifications
| Part Number | 6A1 64W CN |
| Part Name | Cusco Sport TN-S Coilovers |
| Vehicle | 2015-2021 Subaru WRX STI |
| Chassis Code | VAF |
| Engine | EJ25T |
| Drivetrain | AWD |
| Damping Adjustment | 2-Way (24 levels each) |
| Ride-Height Adjustable | Yes |
| Spring Rate – Front | 8 Kg/mm |
| Spring Rate – Rear | 8 Kg/mm |
| Camber Plates – Front | Yes (Pillow Ball) |
| Camber Plates – Rear | No |
| Notes | WRX STI 4-door sedan; street use spec |


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