XYZ Racing Circuit Master Coilovers — Scion XB bB 4WD 2003-2007

The xB bB’s tall, van-like body sits high enough that factory-spec dampers let it roll hard into any decent corner, and the 4WD driveline adds weight over the front axle that a stock ride struggles to control once the pace picks up. Circuit Master is built for exactly that fight: sustained lap sessions where body control, not comfort, decides how consistent your times are from the first lap to the last.

For an SC04-chassis xB bB running 4WD, that means a coilover that keeps the tall body flat under load rather than one tuned for a quiet commute. This is the spec for owners doing repeated circuit sessions, not the odd spirited B-road drive.

What this coilover does for your 2003-2007 Scion XB bB 4WD

Fitted to the 2003-2007 xB bB 4WD, Circuit Master pulls the centre of gravity down and gives the chassis a firmer platform to work from mid-corner, cutting into the body roll that this tall-bodied platform is naturally prone to. The damper’s 3-knob adjustment lets you separate compression and rebound behaviour front and rear, so you can trim out the nose-heavy feel that comes with the 4WD hardware without upsetting rear grip on turn-in. With 9,720 discrete adjustment combinations on offer, you’re not picking between two or three canned settings – you can chase a specific balance for your tyre choice, track surface and session length, then leave it there. The result on track is a car that transfers load more predictably lap to lap, so your inputs at the limit produce the same result each time rather than a moving target.

About the Circuit Master coilover

Circuit Master is XYZ Racing’s dedicated circuit-day design, built off the same platform used and validated by XYZ’s own racing teams competing internationally. The monotube-style damper design centres on a 3-knob adjuster with a small internal oil-passage design, giving the fine-grained 9,720-way adjustment range that lets a team or owner tune compression and rebound independently front and rear. Because the oil passage is intentionally narrow to deliver that resolution of adjustment, you may notice a faint noise through the damper when the car crosses a sharp bump or kerb at speed – that’s the small-passage design doing its job, not a fault, and it’s specific to how this unit achieves circuit-grade adjustability. The whole package is built for cars that see repeated, back-to-back track sessions rather than occasional weekend use, where a damper needs to hold its set-up through a full run of laps.

Fitment for the Scion XB Bb 4WD (2003-2007)

Circuit Master for this application is built specifically for the SC04-chassis Scion xB bB 4WD, covering the 2003 to 2007 model years. Confirm your build year falls within that window and that your car is the 4WD variant before ordering, as the coilover is matched to this drivetrain’s mounting points and corner weights.

What buyers also search for

• Scion xB bB 4WD suspension setup for circuit lap-time work
• Scion xB bB coilover adjustment range for dialling out front-end weight from the 4WD driveline
• 2003-2007 xB bB body roll control for track-day driving
• SC04 chassis coilover kit built for repeated circuit sessions

Configure your Circuit Master spec for the 2003-2007 Scion xB bB 4WD below.