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Five-emulsion billet metering blocks and four-corner idle circuits offer flexible tunability that today's high-horsepower engines demand
The fabricated
eight bowtie valve cover wing nuts (141-756
traditional shell profile
000 psi Tensile Strength - 1 Set per Cylinder Head - Longer than stock (for use with washers) - 1/2" Hex Head
Manley Valve Spring, SPRING-1.610 DOUBLE 1990-pontiac-firebird-esi3548487 Five-emulsion billet metering blocks andFrom 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.
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