SPC Performance Upper Control Arm - Adjustable - Screw-In Ball Joint - Steel - Black Paint - Chevy Fullsize Car 1955-57 (Pair) 3419WH 360° full-floating arm-gussets

360° full-floating arm-gussets

500 in Head

Includes precision-ground crown radius and surface finish to promote performance camshaft compatibility and high-rpm durability

Used in low-power dog-ring racing transaxles with moderate to low load

SPC Performance Upper Control Arm - Adjustable - Screw-In Ball Joint - Steel - Black Paint - Chevy Fullsize Car 1955-57 (Pair) 3419WH 360° full-floating arm-gussetsUse this patented design with the most adjustability and best clearance of any arm on the market to modernize the front suspension on your classic Chevy. SPC uses a 1 2" extended ball stud to improve camber curve, now adjust in some caster and a bit of camber and enjoy the drive. The fully rebuildable and greasable ball joints can also be customized for you ride with available OE length and 1 4" extended Studs. Sold as pairs. US Patent No.