XYZ Racing Circuit Master Coilovers — Mazda 323 BF (GTX) 4WD 1987-1989

The 323 BF GTX is a homologation special hiding in a hatchback shell – a 1.6 turbo Group A weapon with permanent 4WD, viscous centre coupling, and a chassis that Mazda built specifically to go rallying. Nearly four decades on, the surviving cars are tired in the suspension department long before the drivetrain gives up, and that is exactly where the Circuit Master earns its place.

This is the XYZ Racing Circuit Master coilover built for the GTX’s specific geometry – MacPherson struts up front, multi-link at the rear, and the extra unsprung mass that comes with driveshafts feeding all four corners. It is the sharper end of XYZ’s road-biased range, aimed at owners who want the BF to corner like the rally car it nearly was without turning the daily commute into penance.

What this coilover does for your 1987-1989 Mazda 323 BF (GTX) 4WD

A fresh Circuit Master transforms how the BF puts power down out of a corner. The original GTX struts have almost certainly lost their gas charge and the rubber bushings have been weeping since the Cool Britannia era – swapping to a height-adjustable monotube coilover restores the damping authority the 4WD system was tuned around. You get back the front-end bite the GTX needs to rotate, the rear stays planted when the centre diff sends torque rearward, and ride height drops cleanly without binding the driveshaft angles. Spring rates are matched to the BF’s kerb weight rather than guessed from a generic Japanese hatchback chart, which means the car settles after bumps instead of pogoing on its bump stops. Adjustable damping gives you somewhere to go when you swap from road tyres to a stickier rally compound.

About the Circuit Master coilover

The Circuit Master is XYZ Racing’s sport-touring spec – a 32-step adjustable monotube damper running pillowball top mounts at the front and rubber-isolated mounts where the chassis demands it. Construction is a one-piece welded body with separate spring perch and lower bracket, hard-anodised for corrosion resistance on a car that will inevitably see British winters. Spring rates are specified for the BF GTX’s front-heavy 4WD layout rather than carried over from the FWD 323 platforms, and the height adjustment is by lower-bracket movement rather than spring preload, so you set ride height without changing the spring’s working range. The damper internals are rebuildable and revalvable through XYZ’s service network, which matters on a 35-year-old chassis where the coilover will likely outlast several sets of tyres and bushings.

Fitment for the Mazda 323 BF (GTX) 4WD (1987-1989)

This kit is cut specifically for the GTX chassis code – the turbocharged 4WD variant of the BF generation, not the FWD 1.6i or the naturally aspirated hatches. Year coverage runs 1987 to 1989, covering the full production run of the homologation car. Check your VIN plate against the GTX designation before ordering; the FWD BF takes a different spec.

What buyers also search for

• Mazda 323 GTX coilover upgrade for fast road and occasional rally use
• BF GTX 4WD suspension refresh that keeps the original ride character
• 1980s homologation hatchback coilovers with rebuildable monotube dampers
• Mazda 323 GTX height-adjustable suspension without driveshaft bind
• 32-way adjustable coilovers for the Group A-era 323 4WD

Configure your spring rates and top mount preference in the builder below.