Patriot Performance Valve Springs, Locks, and Retainers

If you need assistance in selecting the springs that are right for you, Thunder Racing has spent a great deal of time researching numerous combinations of valve springs from various manufacturers.  Our  Power Technology PT-200 valve spring tester has been used to measure seat pressure, open pressure, coil bind height, and spring rate for each type of valve spring that we offer.  For an additional charge, we also have the ability to provide each customer with a printout outlining each of these parameters for your specific valve springs.