SPL Adjustable Front Caster Rod Monoball Bushings

Sharpen your front end with SPL Parts Front Caster Rod Monoball Bushings for the A90 Supra and Z4. The factory caster rod uses soft rubber bushings that flex under braking and cornering loads, letting the front geometry move around and blunting feedback right when you need it. These monoball bushings swap that rubber for low friction spherical bearings, so the suspension holds its position under load and the car talks to you through the wheel and the brake pedal.

Built around massive 1 inch FK racing bearings with self lubricating Teflon liners for durability and smooth articulation, they also add real adjustment the factory setup does not have. CNC machined offset bearing spacers give you plus or minus 4 degrees of caster, so you can add caster for sharper turn in and better high speed stability or set it back to spec. Dialing in caster here is also one of the ways to open up clearance between the sway bar and lower control arm on a lowered A90 or Z4.

Housed in 6061-T6 aluminum, made in the USA, and sold as a pair. These press into your factory caster rods, so the OEM arms are not included.

FITMENT

- A90 Supra (2020+)

- G29 Z4 (2019+)