SPC Performance

The best alignment parts for a lowered WRX, STI, BRZ, or other Japanese performance car are adjustable camber bolts, toe arms, and control arms that restore correct alignment geometry after a drop or coilover install. SPC Performance (Specialty Products Company) is the reference name in this space: their camber bolts, adjustable toe arms, and control arms give adjustment range that fixed factory hardware cannot. For a street car, correct alignment means even tire wear and a car that tracks straight; for track and autocross builds, it is the foundation every other handling part depends on.

Any time ride height changes, the factory alignment geometry moves with it. Camber drifts negative, toe shifts, and tires start wearing unevenly — sometimes visibly within a few thousand miles. Alignment parts fix this at the hardware level: eccentric cam bolts replace fixed OE bolts so an alignment tech has adjustment where the factory provided none, while adjustable toe arms and control arms swap non-adjustable links for range-adjustable versions with finer, repeatable tuning. Pair them with fresh suspension bushings and lowering springs for a complete chassis refresh.

About SPC Performance

SPC Performance is the enthusiast arm of Specialty Products Company, a business that has spent decades focused on essentially one thing: wheel alignment. Where most aftermarket brands start with horsepower, SPC started with geometry — engineering camber and caster adjustment kits that let shops correct angles the factory never made adjustable. Their patented EZ Cam bolts and XR camber bolt kits are shop-staple hardware, and the adjustable toe arms and upper control arms here extend that thinking to the rear of the car, where lowering springs and coilovers throw toe and camber out of reach. Related handling brands like Whiteline cover the rest of the chassis when you are ready.

The SPC rear adjustable toe arm (2008–2020 WRX/STI, 2009–2012 Forester), the EZ cam bolt kit (2008–2020 WRX), and the universal EZ Camber XR bolts share one philosophy: heavy-duty forged and machined hardware replacing OE links outright, with adjustment mechanisms a competent alignment shop can set and lock. See how aftermarket parts improve handling before you plan your build.

Frequently Asked Questions

Do I need alignment parts after lowering my car?

Usually yes — at minimum, have the alignment checked after any ride-height change. If the shop cannot bring camber, caster, or toe back into spec with factory hardware, add adjustable bolts or arms before you burn through tires.

Camber bolts or adjustable control arms — which should I buy?

Bolts are the economical fix for roughly a degree of correction, which covers many mild drops. Arms cost more but give wider range and finer control — the better choice for aggressive drops, multi-link rear suspensions, and track setups. Check your year and model for options.

Can I install SPC camber bolts or arms myself?

The swap is straightforward — unbolt the OE link, install the part, torque to spec. But the car must go to an alignment rack immediately afterward, since the new hardware has no correct setting until a shop sets it.

Which SPC parts fit my car?

Applications are chassis- and generation-specific: toe arms for 2008–2020 WRX/STI and 2009–2012 Forester, EZ cam bolts for 2008–2020 WRX, plus kits for Civic, BRZ/86, 4Runner, and FJ Cruiser. Confirm your year and model before ordering.