RS-R Sports-i coilovers for the 2015-2021 Subaru Impreza WRX balance daily-driver comfort with serious track capability on the same set of dampers. The 36-level single-knob adjustment, vehicle-specific spring rates, and full ride-height range let you dial the Impreza in for the commute on Monday and for a canyon run or track day on Saturday without touching a tool beyond the damper click wheel.
The Sports-i is RS-R’s foundation street-and-canyon coilover — a 36-level single-knob monotube damper built in-house in Osaka, Japan, with full ride-height adjustment and vehicle-specific spring rates. It is engineered to be driven daily yet firm enough for spirited weekend use. Backed by RS-R’s 1-year / 12,000-mile warranty and available as a rebuildable, serviceable unit.
Features
What’s Included
Specifications
| Part Number | XSPIF400M |
| Part Name | RS-R Sports-i Coilovers |
| Vehicle | 2015-2021 Subaru Impreza WRX |
| Damping Adjustment | 36-Level Single-Knob |
| Ride-Height Adjustable | Yes |
| Damper Construction | Monotube |
| Preset Approximate Height – Front | -35mm (-1.4inch) |
| Preset Approximate Height – Rear | -25mm (-1.0inch) |
| Maximum Adjustment Range – Front | +10mm to -85mm (+0.4inch to -3.4inch) |
| Maximum Adjustment Range – Rear | +35mm to -105mm (+1.4inch to -4.2inch) |
| Recommended Adjustment Range – Front | -10mm to -50mm (-0.4inch to -2.0inch) |
| Recommended Adjustment Range – Rear | 0mm to -45mm (0.0inch to -1.8inch) |
| Spring Rate – Front | 8.00 Kg/mm |
| Spring Rate – Rear | 6.00 Kg/mm |
| Upper Mount – Front | Rubber Bushings (OEM-style) |
| Upper Mount – Rear | Rubber Bushings (OEM-style) |
| Suspension Design – Front | True Coilover |
| Suspension Design – Rear | True Coilover |
| Rebuildable | Yes |
| Warranty | 1 Year / 12,000 Miles |
| Notes | – |


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