Manley Valve Spring, SPRING-1.610 DOUBLE 1990-pontiac-firebird-esi3548487 All Vibrant Performance hose end

All Vibrant Performance hose end fittings are available in anodized black only

This set-up may not clear all lower hanging long tube headers

000 psi Tensile Strength - 1 Set per Cylinder Head - Longer than stock (for use with washers) - 1/2" Hex Head

Comes with two (2) 120-grit grinding wheels (p/n 66762) and battery recharger

Edelbrock part #7158 Performer RPM small port intake manifold is designed to fit 1958-1965 Chevrolet 348/409 "W" big-block engines

Manley Valve Spring, SPRING-1.610 DOUBLE 1990-pontiac-firebird-esi3548487 All Vibrant Performance hose endFrom 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.