Product Description
Valve Spring Set (12) Competition - 149633URK
Larger diameter springs which allow valve lifts of over 0.495" and still control the top end revs up to 9000rpm. Supplied as a set of 12 pairs these competition springs must be used with large diameter alloy valve caps RW3001. Recommended for use with RR1511 roller rocker conversion. Do not use with lower spring collars.