XYZ Racing Top Sport Coilovers — Scion XB bB 4WD 2003-2007

The Scion xB, badged as the Toyota bB in Japan, carries a tall, box-section body over a 4WD platform, which pushes its centre of gravity noticeably higher than most cars sharing its footprint. Push that shape into a corner on the factory dampers and you feel the lean arrive early and stay there through the exit. The XYZ Racing Top Sport coilover kit for the SC04-chassis xB bB 4WD (2003-2007) is set up for exactly that mismatch between a boxy silhouette and real cornering load.

It is built around occasional track day use plus a car you still drive to work on Monday, so the damping curve is firmer than a street-only setup without tipping into a ride that beats you up over broken tarmac. For an xB bB owner chasing sharper turn-in without giving up the everyday usability that made the car appealing in the first place, that middle ground is the point.

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

Fitting this kit to a 2003-2007 Scion XB bB 4WD cuts directly into the body roll that comes with the tall bB shape – the raised spring rate and increased damping force resist the lean that stock suspension allows once cornering loads build. That control keeps more of each tyre’s contact patch loaded evenly through a bend, which on a 4WD car translates into more usable traction out of the corner rather than the front pushing wide. Ride height drops from the stock setting too, lowering the centre of gravity that the bB’s boxy body naturally works against. Big-bump absorption stays intact even with the firmer settings, so a pockmarked B-road or a rough section of circuit doesn’t unsettle the chassis the way a poorly-specified stiff setup would. The net result is a bB that turns in with more confidence and holds its line better under load, on street and track alike.

About the Top Sport coilover

XYZ Racing built the Top Sport line around a straightforward brief: increase damping force by roughly 30 to 50 percent, or lift spring rate by around 2kg/mm, over a standard street coilover setting. That extra force is there to control the chassis through big hits – potholes, kerbs, mid-corner bumps – without the shock body kicking back or the tyre losing its grip on the road surface. The spec comes directly out of XYZ Racing’s own track day experience, tuned around what actually holds a car settled when the pace picks up rather than a theoretical number on a spec sheet. It is a deliberate step up from a comfort-biased coilover, aimed at drivers who want the car to feel planted under harder inputs – trail braking, quick direction changes, sustained cornering loads – while remaining something you can still drive to the circuit and home again. For the xB bB, that stiffer, better-controlled setup does real work against a body shape that was never designed with cornering grip as the priority.

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

This kit is built specifically for the SC04-chassis Scion xB bB in 4WD form, covering the 2003 to 2007 production run. Confirm your car matches this chassis code and drivetrain before ordering, since the bB range spans more than one generation and driveline configuration over its production life.

What buyers also search for

• Scion xB bB 4WD coilover kit for tighter cornering and less body lean
• Top Sport coilover damping for a boxy, high-centre-of-gravity chassis
• 2003-2007 Scion xB bB suspension upgrade for track day and street driving
• SC04 chassis coilover kit with adjustable ride height
• XYZ Racing Top Sport coilovers for 4WD Scion xB bB

Spec your ride height and damping to suit how you actually use the car – configure yours below.