GM 604 Crate Engine Valve Springs and Hardware
PAC Racing Springs has supplied Valve Springs to the racing industry for the GM 604 Crate Engine. These springs are designed to factory specs, however, they are consistent and out last the crate springs.
PAC now offers a Retainer, Locks and Spring Seat for these engines.
PAC-L8157 Valve Lock
PAC-R395 Spring retainer
PAC-S142 Spring Seat (Locator)
PAC now offers a Retainer, Locks and Spring Seat for these engines.
PAC-L8157 Valve Lock
PAC-R395 Spring retainer
PAC-S142 Spring Seat (Locator)