XYZ Racing Circuit Master Coilovers — Subaru IMPREZA WRX/ WRX STI AWD 4WD 2015-2021

The VA-generation WRX and WRX STI’s symmetrical AWD system sends the boxer engine’s torque through a centre differential that is constantly redistributing load between front and rear axles, and the standard dampers struggle to hold body control steady while that transfer happens mid-corner. The XYZ Racing Circuit Master coilover is built for sustained circuit lap-time work, replacing that soft factory platform with a chassis that holds its geometry through repeated braking zones and corner-entry weight transfer.

On the Impreza WRX/WRX STI AWD 4WD, that matters because the low-slung boxer engine keeps the car’s mass working with the drivetrain rather than rocking it through direction changes. Owners running the SU12 chassis on track days get a suspension platform that matches the grip the AWD system is already putting down, instead of fighting it through every transition.

What this coilover does for your 2015-2021 Subaru Impreza WRX/ WRX STI AWD 4WD

The Circuit Master’s 9720-way damping adjustment, split across three external knobs, lets you set compression and rebound independently at each corner. That matters on this chassis because the AWD drivetrain loads the front and rear axles differently under power than a two-wheel-drive car does. Stiffening the rear circuit helps control the squat that comes from putting boxer torque through all four wheels off a slow corner, while a softer front setting keeps steering feel intact into trail-braking zones. Height and damping are adjustable independently, so you can drop the WRX or STI’s stance for a lower centre of gravity without sacrificing the travel a full circuit session needs. The result is a car that changes direction with less roll and holds its line through the compressions typical of a UK circuit like Snetterton or Cadwell Park, where the Impreza’s AWD grip is otherwise wasted by a chassis that can’t keep the tyres loaded evenly.

About the Circuit Master coilover

XYZ Racing built the Circuit Master range specifically for competitive circuit driving, and the kit has gone through extended testing with XYZ’s own racing teams on circuits internationally before reaching production. Each damper offers 9720 possible adjustment combinations across its three external knobs, giving drivers a genuinely wide range to match compression and rebound to a specific track surface, tyre compound or driving style. That fine control comes from a small-orifice internal oil circuit, and one side effect worth knowing about is that on rough surfaces or expansion joints you may hear a faint noise as oil moves through the narrow passage. That is normal for this design, not a fault – the Circuit Master is built around smooth circuit tarmac rather than potholed B-roads, and the noise has no bearing on how the damper performs on track.

Fitment for the Subaru Impreza WRX/ WRX STI AWD 4WD (2015-2021)

This kit is built for the SU12-chassis Subaru Impreza, covering both WRX and WRX STI AWD 4WD models produced between 2015 and 2021. Confirm your Impreza matches the SU12 chassis code before ordering, as suspension geometry and mounting points differ between Subaru generations.

What buyers also search for

• Subaru Impreza WRX STI suspension upgrade for road and track
• Subaru WRX AWD coilover damping that holds up across repeat circuit sessions
• Circuit Master coilover height and damping adjustment for the SU12 Impreza
• Subaru Impreza WRX STI track day suspension setup

Built for drivers taking the SU12 WRX or WRX STI onto a UK circuit and wanting the AWD platform to respond the way it should – configure yours below.