XYZ Racing Super Sport Coilovers — Nissan 240/260/280 Z φ51 welding 1970-1978

The S30-generation Z car was never meant to run modern spring rates on its original perch design, which is why the φ51 welding-type Super Sport kit exists: a coilover that grafts onto the strut housing rather than replacing it outright, keeping the early Z’s geometry intact while giving it adjustment range the 1970-1978 factory dampers never had. For a car this old, ride height correction alone is usually the reason owners go looking for coilovers in the first place, and this kit is built around that need first.

This is the fast-road and weekend track spec in the XYZ Racing range, sitting below the full motorsport dampers but well above a simple lowering spring. On a 240Z, 260Z or 280Z that’s seeing regular B-road miles with the odd track day mixed in, that positioning matters: you get real damping control without the harshness that a stiffer, single-purpose setup would put through a 50-year-old shell.

What this coilover does for your 1970-1978 Nissan 240/260/280 Z

Ride height adjustment is the headline change on a car where sagging factory struts and inconsistent stance are common after decades on the road – you can bring the ride height back to a level that suits the chassis rather than whatever the last set of springs settled at. The 36-way damping adjustment lets you run the front and rear independently soft enough to absorb British B-road surfaces on the way to a circuit, then firm the compression and rebound up for the session itself, which matters on a car with as little factory sound-deadening and chassis bracing as the S30 – you feel every change through the seat immediately. Because the kit is a welding-type installation onto the existing φ51 strut housing, the geometry the Z was designed around stays as the factory intended, so you’re adding damping and height control without introducing the bump-steer or camber problems that a poorly matched aftermarket strut can bring to a car this old.

About the Super Sport coilover

XYZ Racing’s Super Sport line was built to solve the harshness that comes with dropping a car onto stiffer springs without giving the damper anywhere to work – the brief was to take the discomfort out of rough-road driving while still giving a car genuine handling gains. The 36-way adjustment knob covers everything from a comfortable daily setting through to a firmer track configuration, so the same damper that handles a pothole-scarred commute can be wound up for a track day without swapping parts. Ride height is independently adjustable via the threaded body, letting you set stance and corner weight distribution separately from spring preload. For the 240/260/280 Z specifically, the kit is supplied as a φ51 welding-type unit, meaning it’s fitted directly to the existing strut tube rather than as a bolt-in cartridge – a common and accepted route for keeping early Z struts serviceable decades after the factory parts are long out of production. XYZ position this damper as equally suited to weekend racing and everyday use, which is the balance most S30 owners are actually after rather than a single-purpose track-only setup.

Fitment for the Nissan 240/260/280 Z (1970-1978)

This kit is built for the Nissan 240/260/280 Z φ51 welding chassis, covering the full 1970 to 1978 production span of the S30 generation. The welding-type construction means fitment is onto the original φ51 strut housing rather than a direct cartridge swap, so confirm your car’s strut tube diameter matches φ51 before ordering.

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Get the ride height and damping control your S30 has been missing since 1978 – configure your Super Sport spec below.