XYZ Racing Racing Spec Coilovers — Honda CIVIC SI φ54 (Modified Rear lntegrated) 2017-2026

Push a turbocharged, front-driven Civic Si hard into a corner and the nose loads up before the rear axle ever gets a vote – the classic FWD trade-off between corner-entry bite and the torque steer that shows up the moment you’re back on the throttle. XYZ Racing’s Racing Spec coilover is built around managing exactly that trade-off, not softening it for comfort.

This is the top-tier kit in the range, aimed at drivers doing serious track and time-attack sessions in the HN25-10-chassis Si rather than a fast-road commute. It replaces the factory strut and spring package outright, giving you a platform tuned for repeated hard laps instead of one compromised for ride comfort.

What this coilover does for your 2017-2026 Honda Civic Si Φ54 (Modified Rr Integrated)

On a Civic Si pushed on circuit, the front end needs to load progressively under trail-braking so the car rotates instead of washing wide, and the rear needs to stay planted the instant you get back into the throttle and torque steer starts pulling at the wheel. The Racing Spec’s damping is set up for that specific sequence – control on turn-in, resistance to squat under power, and a chassis that stays flat enough through direction changes that you can actually feel what the front tyres are doing. Ride height and corner balance become tools you set for the circuit in front of you, not fixed factory compromises. The modified rear integrated mounting on this application also keeps the rear geometry consistent as you lower the car, rather than the mount fighting the new ride height.

About the Racing Spec coilover

Racing Spec sits at the top of XYZ Racing’s coilover line-up and is built specifically for circuit racing rather than road use. The damping settings aren’t generic – they’ve been pulled directly from XYZ’s own involvement in competition, including WTCC, so the valving reflects what actually holds up over a full race stint rather than a single hot lap. For cars carrying heavier modifications – bigger aero, wider tyres, a full cage, or anything closer to a built racing car than a road car with a track habit – XYZ will build a bespoke damper rather than force-fit the standard spec. That means sending over what’s been changed on the car and which circuit or circuits it’s run on, and getting a shock valved around that actual combination rather than a one-size-fits-all setting.

Fitment for the Honda Civic Si Φ54 (Modified Rr Integrated) (2017-2026)

This kit is specced for the HN25-10 chassis code covering Honda Civic Si Φ54 models built between 2017 and 2026, with the modified rear integrated mounting configuration built into this specific application. Confirm your build year falls within that span and that your rear end matches the modified integrated setup before ordering.

What buyers also search for

• Honda Civic Si track coilovers for time-attack and circuit days.
• Racing Spec damping built to control torque steer under hard acceleration.
• HN25-10 chassis suspension upgrade for competition use.
• Custom-valved Honda Civic Si coilovers for heavily modified track cars.

Circuit-derived damping and a fitment built around the HN25-10 Civic Si’s specific rear mounting – configure yours below to get the spec that matches how you’re actually running the car.