XYZ Racing Super Sport Coilovers — Mazda COSMO 13B/20B ROTARY 1990-1996

The Eunos Cosmo is the unicorn of the rotary world – twin-turbo 13B-REW or the only road-going 20B three-rotor Mazda ever built, wrapped in a heavy GT body that was never meant to be hustled. Three decades on, the cars that survive are running on tired dampers that were soft when new, and the standard suspension simply cannot keep a 1,500kg luxury coupé settled when the boost arrives.

The XYZ Racing Super Sport coilover is the fast-road answer for a JCESE owner who wants the car to feel as exotic as it sounds. It tightens the body control the original setup gave away to comfort, without turning a long-wheelbase GT into something that hammers on broken B-roads.

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

The Cosmo’s combination of mass over the front axle and a relatively soft factory rear leaves it leaning hard mid-corner, then unsettled when the turbos spool on exit. The Super Sport addresses that with a monotube damper, 30-position adjustment and pillowball top mounts where the chassis allows, so you can take the wallow out without losing the long-distance manners the car was built for. Ride height is set on the lower spring perch rather than by preload, which keeps spring travel intact and protects the bushes the car still has left.

For a 20B owner running the full 280bhp through a torque-converter automatic, the gain is measured in confidence: the front end stops washing wide when you commit to a fast sweeper, and the rear stays planted when the sequential turbos hand off.

About the Super Sport coilover

The Super Sport sits in the middle of the XYZ Racing range – a single-adjustable monotube built around a hardened chrome piston rod and a separate spring assembly that lets you reset corner weights without losing your damping setting. 30 clicks of compound bump-and-rebound adjustment cover the spread from motorway compliance to a brisk fast-road setting. Camber-adjustable pillowball top mounts at the front are included where the chassis architecture supports them; otherwise the original top mount geometry is retained. Spring rates are selected for a heavy 2+2 GT rather than a hot hatch, which matters on a car this dense.

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

Built specifically for the JCESE-chassis Eunos Cosmo, covering both the 13B-REW twin-turbo and the 20B-REW three-rotor variants from 1990 to 1996. This is a JDM-only platform, so fitment data is checked against the Japanese-market chassis numbers – confirm yours before ordering.

What buyers also search for

• Mazda Eunos Cosmo suspension upgrade for a 20B three-rotor rebuild
• JCESE coilover conversion for owners replacing tired factory dampers
• Cosmo 13B-REW fast-road suspension that keeps the GT ride character
• 30-way adjustable coilovers for a heavy JDM grand tourer
• Rotary Cosmo handling upgrade without losing daily driveability

These cars are rare enough that getting the spec right matters – configure yours below.