XYZ Racing Street Advanced Coilovers — BMW Z4 6 CYL (NON 3.2) 2002-2008

The E85/E86 Z4’s straight-six versions – the 2.5i, 3.0i and 3.0si covered here – pair a near 50:50 front-rear weight split with one of BMW’s more direct steering racks of the era, and factory run-flat tyres that leave the ride firm without doing much for actual body control. That combination rewards a coilover that can be leaned toward comfort on the commute and tightened up for a trackday without swapping parts.

XYZ Racing’s Street Advanced kit for the Bmw Z4 6 CYL (NON 3.2) is built around that split brief. It’s the enthusiast’s road coilover – firm enough to sharpen turn-in through the Z4’s quick rack, adjustable enough to soften off again for the drive home.

What this coilover kit does for your 2002-2008 Bmw Z4 6 CYL (NON 3.2)

Drop the ride height and firm up compression on the Z4’s front struts and that already-quick rack turns from nervous to precise – the nose stops floating over crests and settles into a cleaner line through direct-entry corners. With 720 damping settings on offer, you can back the rebound off for the road-going ride the factory run-flats never really gave this car, then wind it up again for a trackday without pulling the kit apart. Because the six-cylinder Z4 carries more weight over the front axle than the four-cylinder cars, matching spring rate to that mass matters more here – stiffen too little and the car still dives under trail braking into the Z4’s tighter hairpins. Ride height adjustment also lets you correct the slightly nose-high stance these cars can settle into as the factory bushes age.

About the Street Advanced coilover

Street Advanced sits at the top of XYZ Racing’s road-focused range, built from damper technology the brand has refined over years of development alongside its racing programmes. Each unit carries 720 discrete damping positions split across compression and rebound, so the adjustment range runs from a genuinely comfortable daily setting through to a firm trackday spec without changing springs or dampers. XYZ pitches Street Advanced specifically at drivers who split their time between normal road use and the odd track day, rather than committing fully to one or the other. The construction draws on lessons carried over from XYZ’s competition entries, translated into a kit that’s tuneable rather than fixed – the goal is a coilover a road-registered car can live with every day and still take seriously on a circuit outing. For a Z4 with the inline-six under the bonnet, that range of adjustment gives you room to correct for the car’s extra nose weight without resorting to a harsher, single-purpose set-up.

Fitment for the Bmw Z4 6 CYL (NON 3.2) (2002-2008)

This kit is specified for the Bmw Z4 6 CYL (NON 3.2) – chassis code BM74 – built between 2002 and 2008, covering the straight-six models outside the 3.2-litre M-engined cars. Confirm your Z4’s engine and build year against your V5C before ordering, since the four-cylinder and 3.2-litre variants use different fitment kits.

What buyers also search for

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Pick the damping range that matches how you’ll actually use your Z4 6 CYL and configure your Street Advanced kit below.