SPC Performance Upper Control Arm - Adjustable - Screw-In Ball Joint - Steel - Black Paint - Chevy Fullsize Car 1955-57 (Pair) 3419WH Used in low-power dog-ring racing

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

360° full-floating arm-gussets

Nylon Parachute

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

Dedenbear's innovative water header replaces the usual mess of fittings

SPC Performance Upper Control Arm - Adjustable - Screw-In Ball Joint - Steel - Black Paint - Chevy Fullsize Car 1955-57 (Pair) 3419WH Used in low-power dog-ring racingUse 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.