XYZ Racing Tarmac Rally Coilovers — Nissan SILVIA/200SX S12 φ51 welding 1983-1989

Sealed-stage tarmac rallying punishes a car in a way circuit driving never does: broken road surfaces, mid-corner camber changes, and compressions taken at speed with no run-off if the rear steps out. The S12 Silvia/200SX’s narrow-track, RWD coupe body was built for exactly that kind of event in period, and this XYZ Racing Tarmac Rally coilover kit is tuned to keep that chassis composed when the surface underneath it isn’t.

Because the S12 platform predates threaded strut-top provisions, this kit is supplied in φ51 Welding spec – the insert is welded into your existing strut housing rather than bolted to a factory perch, which is the correct route for getting a modern damper into a 1980s Nissan strut without fabricating a new top mount from scratch.

What this coilover does for your 1983-1989 Nissan SILVIA/200SX S12 φ51 WELDING

On a stage littered with mid-corner bumps and compressions, the damping here is set up to catch the jolt before it unsettles the car, rather than letting it translate straight into the chassis. That keeps the tyre loaded and in contact with the road surface through the rough sections instead of skipping across them, which on a narrow-track RWD coupe like the S12 is the difference between the rear staying planted and the rear stepping wide. The result on gravel-adjacent tarmac and patched B-roads is a car that holds its line under load rather than getting deflected by every ridge and pothole, with body movement kept in check so your inputs stay predictable from turn-in through to exit.

About the Tarmac Rally coilover

XYZ built this damper specifically around sealed-stage tarmac work, where the road surface is rarely smooth and rarely consistent corner to corner. The valving is calibrated to soak up sharp, high-frequency hits – the kind you get crossing a bad patch or a compression taken flat – without the body kicking back and unsettling the chassis afterwards. That control is what keeps the tyre’s contact patch working rather than bouncing, which is where the traction gain actually comes from rather than from the tyre itself. The damping curve and spring rate pairing here come directly from XYZ’s own Tarmac Rally programme, carried over from stage work rather than derived on a road-car test bench, and the result is a car that stays settled and predictable when the surface underneath it isn’t.

Fitment for the Nissan SILVIA/200SX S12 φ51 WELDING (1983-1989)

This kit is built specifically for the Nissan Silvia/200SX S12 chassis (NI75) across the full 1983 to 1989 production run, in the φ51 Welding configuration for strut housings without a factory threaded top-mount provision. Confirm your car matches the S12 generation before ordering, as strut architecture changed across later Silvia platforms.

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Fitment is confirmed for the 1983-1989 S12 Silvia/200SX in Φ51 Welding spec – pick your damping and spring rate below to build yours.