XYZ Racing Super Sport Coilovers — BMW Z4 4 CYL 2002-2008

The Z4’s front-engine, rear-drive balance rewards a chassis that can vary its damping to match the road, not just stiffen against it. XYZ Racing’s Super Sport coilover gives the four-cylinder E85/E86-era Z4 exactly that range, running 36 clicks of damping adjustment so the same car can sit compliant on a broken B-road commute and firm up for a weekend track session without swapping parts.

Built for fast-road and weekend track use rather than a dedicated race car, the Super Sport is the pick for owners who want to sharpen turn-in and body control on their Z4 without living with a harsh daily ride. Ride height is independently adjustable too, so stance and corner weighting can be set once the springs have settled.

What this coilover does for your 2002-2008 Bmw Z4 4 CYL

Drop the ride height and firm up compression damping and the Z4’s nose stops diving under braking into a corner, which matters on a chassis this light and this direct – small inputs already do a lot, and unsettled front-end movement just adds noise you have to correct for. Away from the circuit, the 36-way adjustment is what makes this usable as a daily: back the damping off and the ride recovers enough to deal with UK B-roads and speed humps without the car feeling like it’s fighting the surface. Firm it up again for a trackday and body roll drops noticeably through direction changes, giving the rear axle more consistent weight transfer as you get back on the throttle. The height adjustment also lets you correct the slight rake most Z4s pick up once anything heavier goes in the boot, keeping the geometry closer to what the suspension was actually tuned around.

About the Super Sport coilover

The Super Sport was designed around a specific complaint: standard springs and dampers transmit too much of what’s happening at the road surface straight into the cabin. XYZ Racing addressed that by building in 36 distinct damping stages, giving a far finer gradient between comfort and control than a basic 2-way or non-adjustable set-up. Ride height adjustment is built into the same unit, so lowering the car doesn’t lock you into a single damping character – you’re not choosing between "low and harsh" or "comfortable and high." That range is the point: this is described as suited to both weekend race use and daily driving, which is a different design brief to a fixed-rate track-only coilover. Construction follows XYZ’s usual monotube-based approach, aimed at keeping damping force consistent as the unit heats up over repeated inputs, rather than fading as oil temperature climbs.

Fitment for the Bmw Z4 4 CYL (2002-2008)

This kit is specced for the four-cylinder Bmw Z4 (chassis code BM73), covering the 2002 to 2008 model years. Confirm your Z4 is running the 4-cylinder engine before ordering, as the 6-cylinder cars use a different chassis application.

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Get the damping range and adjustable ride height matched to how you actually use your Z4 – configure yours below.