Manley Valve Spring, SPRING-1.500 DOUBLE 2001 pontiac firebird Nonadjustable

Nonadjustable

Kit is a direct bolt in with no modifications required

Combine this with soft bushings that have massive amounts of deflection

They are 100% dyno tested and serialized and serviceable and rebuildable by QA1 authorized service centers

Manley Valve Spring, SPRING-1.500 DOUBLE 2001 pontiac firebird NonadjustableFrom 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.