XYZ Racing Street Advanced Coilovers — BMW 02 SERIES φ45 welding 1966-1977

The BM81-chassis 02 Series left the factory with a MacPherson strut front end and no provision for ride-height adjustment, so any modern coilover conversion has to weld a collar onto the existing 45mm strut tube rather than bolt on to a factory perch. XYZ Racing’s Street Advanced kit is built around exactly that φ45 welded-collar format, giving 1966-1977 02 Series owners a proper adjustable spring perch on a chassis that was never designed to carry one.

Street Advanced sits below the full race-spec lines in the range – it’s aimed at enthusiasts who want a 02 Series that rides properly on the road and can still be tightened up for a track day without swapping parts. On a car this light, small changes in spring rate and damping are felt immediately, which is exactly the territory this kit is built for.

What this coilover does for your 1966-1977 Bmw 02 SERIES φ45 WELDING

Fit these to a 02 Series and the first thing you notice is how much of the car’s natural agility comes back once tired factory struts and bushings are replaced with a properly matched spring and damper. The 720-way damping adjustment lets you soften low-speed compression for B-road use, then wind in more control over both bump and rebound before a track session, without swapping a single component. Ride height drops through the same welded collar that anchors the spring, so you can trim the nose down slightly to sharpen turn-in on a car whose factory geometry was set for comfort rather than cornering. The 02 Series’ MacPherson-strut front and semi-trailing-arm rear respond well to matched damping front-to-rear, and with 720 increments to work through you can work out the vague, wallowy character these cars pick up after five decades of tired factory dampers.

About the Street Advanced coilover

Street Advanced is the volume model in XYZ Racing’s range, refined over several seasons by the brand’s own engineering team and proven at the international events where XYZ’s kits have been raced. It’s a dual-purpose kit rather than a dedicated track item – built for drivers who use the car on the road most of the time but want the option of a trackday without a full competition setup’s trade-offs. The headline spec is 720-way damping adjustment, giving a genuinely fine-grained range between comfort and control rather than the handful of clicks some budget kits offer. For the 02 Series application, the φ45 welded-collar construction fixes the spring perch to the strut body itself, a method suited to a chassis of this age that has no factory-fitted adjustable perch to build from. XYZ positions this line as essential equipment for drivers chasing real pace and control, and on a 1970s-tuned chassis this soft from the factory, the jump in composure is significant.

Fitment for the Bmw 02 SERIES φ45 WELDING (1966-1977)

This kit is specified for the BMW 02 Series, chassis code BM81, across the full 1966-1977 production run. The φ45 welded-collar format matches this era’s strut tube diameter, so confirm your strut’s outer diameter measures 45mm before ordering.

What buyers also search for

• BMW 02 Series coilover upgrade for classic road and track use
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• BMW 02 Series φ45 welded coilover kit for chassis without a factory adjustable perch
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Confirm your strut diameter and current ride height, then build your Street Advanced spec for the 02 Series below.