XYZ Racing Street Advanced Coilovers — BMW 8 SERIES E31 8 CYL φ55 welding 1990-1999

The E31 8 Series carries a lot of car up front – a V8 sitting well ahead of the front axle, a long wheelbase, and a kerb weight that pushes toward two tonnes on the 840Ci and 830Ci. Factory suspension on this generation was tuned for motorway cruising, not turn-in, and three decades on, most of those springs and dampers have sagged well past their original settings anyway. The Street Advanced kit is XYZ Racing’s enthusiast-street option, built to bring that nose-heavy GT chassis back under control without turning the ride into a chore.

Because the E31’s front struts were never designed around an aftermarket coilover sleeve, this kit uses a φ55 welding-type body – the lower mount is welded onto the original strut housing rather than bolted through a factory perch. It’s the correct way to fit coilovers to an 8 Series that never shipped with a threaded strut design, and it means the finished installation sits as solidly as the factory unit it replaces.

What this coilover does for your 1990-1999 BMW 8 SERIES E31 8 CYL Φ55 WELDING

With 720 damping adjustment ways on offer, you can run the front end softer for the car’s long-distance GT duties and firmer through B-roads or a track day without swapping parts. That range matters more on the 8 Series than on a lighter coupe, because the mass over the front axle punishes an underdamped setup with dive under braking and float through fast direction changes. Dialling more compression and rebound into the front corners pulls that nose-heavy weight transfer back in check, while the rear stays adjustable enough to keep the back axle following through a corner instead of trailing behind it. Ride height is also adjustable independently of spring rate, so you can drop the stance without resorting to cut springs or a mismatched spring/damper pairing – a common problem on older E31s running tired OE parts.

About the Street Advanced coilover

XYZ Racing developed the Street Advanced line over several years of in-house testing, refined further through the marque’s involvement in international motorsport events. It sits between a comfort-focused street kit and a stripped-down circuit setup – the 720-way damping adjustment is the headline figure, giving a wide enough spread to cover daily-road compliance at one end and a track-day session at the other from the same set of dampers. Construction follows XYZ’s usual coilover format: independently adjustable ride height and damping force, sized and valved for the specific weight and geometry of the vehicle it’s built for rather than a generic universal spec. For an E31 owner, that means a kit tuned around this car’s actual mass and front/rear balance, not a repurposed set of dampers from a lighter chassis.

Fitment for the BMW 8 SERIES (1990-1999)

This kit is built for the E31-generation 8 Series, 8-cylinder variants (840Ci/830Ci), covering the full 1990 to 1999 production run under chassis code BM113. The φ55 welding-type construction is specific to this fitment – confirm your strut housings match this mounting style before ordering, as it differs from bolt-on coilover kits used on later BMW platforms.

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Get the exact spec matched to your E31’s chassis and running gear – configure yours below.