Manley Valve Spring, SPRING-1.650 DOUBLE 1996-pontiac-firebird-esi1593369 These upper control arms are

These upper control arms are suitable for various driving conditions

The additional hollow space is filled with CNC-aluminum

UMI’s adjustable upper a-arms feature race quality

with CNC machined bushing holders and MIG welded end caps for durability

Manley Valve Spring, SPRING-1.650 DOUBLE 1996-pontiac-firebird-esi1593369 These upper control arms areFrom drag strips to short track and endurance circuits, the Manley NexTek series is engineered for serious racers. NexTek springs resist pressure loss and valve train degradation even in the most demanding race conditions. That means more consistent spring force deep into a run, reduced valve bounce, and improved overall stability for high RPM performance. Built to outperform and outlast in real world competition.