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Vendor: SPL Parts

SPL Parts 06-13 BMW 3 Series/1 Series (E9X/E8X) Adjustable Front Caster Rod Monoball Bushings
Front Caster Rod Bushings (CRB) replace the stock flexible rubber bushings with low friction, articulating Spherical Bearings eliminating bushing deflection and reducing friction. This maintains optimum suspension geometry under load to improve braking and handling feedback. Massive 1" sized FK Racing Bearings with self...

Regular price

$413.10

Regular price

~~$459.00~~

Sale price

$413.10

Unit price

per

SPL Parts is a Texas-based manufacturer of adjustable suspension components for track-focused street cars — the kind of build where coilovers and a sway bar are step one and SPL is step two. Their core catalog covers rear toe arms, rear lower and upper camber arms, front lower control arms,...

SPL Parts is a Texas-based manufacturer of adjustable suspension components for track-focused street cars — the kind of build where coilovers and a sway bar are step one and SPL is step two. Their core catalog covers rear toe arms, rear lower and upper camber arms, front lower control arms, tie rod ends, sway bar end links, and the eccentric lockouts that go with them on platforms like BMW that use OE eccentric-bolt camber adjustment. Every part is built around the same engineering: 4130 chromoly tubing, 2024 aluminum CNC-machined main bodies, FK Bearings PTFE-Teflon-lined spherical rod ends from Connecticut, and blue-anodized titanium hardware to shave unsprung weight.

The reason SPL parts show up on track cars and not stock-replacement shopping lists is what happens to suspension geometry when you lower a car. Drop ride height an inch with coilovers and the OE rubber-bushed control arms move outside their designed range — toe shifts under load, camber drifts, bumpsteer creeps in, and the alignment you set on the rack doesn't hold once the car is on track. SPL's spherical-bearing design eliminates the bushing deflection that causes most of that drift, and the wider adjustment range lets you actually dial in the alignment numbers a track car needs (more negative camber, more toe range than OE allows). The eccentric lockouts on platforms like BMW preserve the factory eccentric-bolt camber adjustment but lock it down so it can't slip under cornering load.

SPL covers most of the chassis that matter to track-day builders — BMW (E8X, E9X, F2X, F3X, F8X M3/M4, G2X, G42, G8X M2/M3/M4, Z4 G29), Nissan and Infiniti (350Z, 370Z, GT-R, G35, G37, Q50, Q60), Subaru (BRZ, WRX, STi), Toyota (GR86, GR Corolla, GR Supra), Audi (B8/B8.5 S4/A4/A5/S5), Ford S550 Mustang, Chevy Camaro, Cadillac ATS-V/CTS-V, and select Porsche applications. Every part is designed and manufactured in the U.S. and is intended to be installed and aligned by someone who understands what they're changing — call the AutoTalent team if you need help selecting the right parts for a specific build.