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PAC 145# RPM Series Valve Springs

Recent rule changes allow the use of the latest technology which allows for a very sophisticated spring with reduced end size for a small, lightweight retainer. This spring is recommended for drag race applications only.

Mass (g) 73.0
Large End I.D. (in) 0.845
Large End O.D. (in) 1.250
Install Load (LB) 150
Install Height (in) 1.800
Open Load (LB) 390
Open Height (in) 1.250
Coil Bind Max (in) 1.190
Lift Max (in) 0.550
Frequency Base (CPM) 39023