XYZ Racing Street Advanced Coilovers — Mazda COSMO 13B/20B ROTARY 1990-1996

The Eunos Cosmo’s JC-platform chassis was Mazda’s grand-tourer experiment – long wheelbase, triple-rotor 20B in the top trim, and a kerb weight that climbs north of 1,500kg with the auto box and full electronics pack. Three decades on, the factory dampers have long since given up, and the OE replacement pipeline for an MA20-chassis Cosmo is, charitably, thin.

The XYZ Racing Street Advanced coilover is the realistic answer for owners who want to drive their 13B or 20B Cosmo as Mazda intended – composed at motorway speeds, properly damped over British B-road surfaces, and adjustable enough to take out the wallow that age has baked into the original setup.

What this coilover does for your 1990-1996 Mazda COSMO 13B/20B ROTARY

The Cosmo carries its weight high and long, and the factory damping was tuned for cruising rather than control. The Street Advanced kit tightens that up without turning the car into a track special – 30-way damping adjustment means you can run softer settings for daily use and firm things up for spirited driving without changing components. Adjustable ride height lets you address the nose-up rake these cars settle into with age, and the upgraded spring rates restore body control under load, particularly through the rear axle where the triple-rotor’s mass sits highest. Wheel and tyre clearance becomes practical again, and steering response sharpens because the chassis is finally talking to the road.

About the Street Advanced coilover

XYZ Racing’s Street Advanced sits in the fast-road tier of the range – built around a monotube damper body with separate rebound and compression behaviour, paired with linear-rate springs matched to the platform. The 30-way damping dial gives meaningful resolution between settings rather than the broad clicks you find on cheaper kits, and pillow-ball top mounts on applicable corners cut compliance out of the strut path. Construction is hard-anodised aluminium and steel where each is appropriate, and the geometry is set up to preserve OE-style camber curves so alignment behaves predictably after installation. The damper internals are serviceable, which matters on a car you intend to keep.

Fitment for the Mazda COSMO 13B/20B ROTARY (1990-1996)

This kit is built for the MA20-chassis Eunos Cosmo, covering both 13B-REW twin-turbo and 20B-REW triple-rotor variants across the full 1990-1996 production run. Spring rates and damper valving are matched to the JC platform’s weight distribution, so the same kit suits either drivetrain configuration.

What buyers also search for

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Pick your spring rates and damping spec below to configure the kit for your Cosmo.