BTKUSA Adjustable Front Lower Control Arms

The Built to Kill USA (BTK) adjustable front lower control arms are made in the USA to correct front suspension geometry, add rigidity and give you far more alignment range than the factory arms on the S58 G80 M3, G82 and G83 M4 and G87 M2, as well as the S55 F80 M3, F82 and F83 M4 and F87 M2.

Lowering an M car changes the factory geometry and roll center, which leads to uneven tire wear, a lazier front end and more understeer. These FLCAs let you bring camber and track width back where they belong, and the interchangeable roll center spacers correct the ball joint angle on lowered cars so the suspension articulates through its full range without binding. A factory style ride height sensor mount is built in so the sensor stays properly positioned as the arm is adjusted.

Each arm is CNC machined from 6061 T6 billet aluminum for a stiff, lightweight control arm and paired with 17 4 H900 stainless steel double adjusters, so you get precise adjustment without fighting traditional jam nuts. Whether the car is a lowered street build or sees regular track time, these give you the strength and adjustability to set the front end up properly. Sold as a pair, and a professional alignment is required after install.

FITMENT

- F80 M3

- F82 / F83 M4

- F87 M2

- G80 M3 (RWD and xDrive)

- G82 / G83 M4 (RWD and xDrive)

- G87 M2