Manley Valve Spring, SPRING-1.500 DOUBLE 2001 pontiac firebird All BBK mid pipes feature

All BBK mid pipes feature ball and socket style connectors for simple installation and adjustment for good ground clearance

Nonadjustable

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

and adding cornering consistency to your Pontiac G8 and Chevy SS is easy with polyurethane radius rod bushings from BMR Suspension

All Dedenbear linkage style throttle stops come with a needle valve to control the opening rate of the stop

Manley Valve Spring, SPRING-1.500 DOUBLE 2001 pontiac firebird All BBK mid pipes featureFrom 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.