PAC Racing Springs PAC-1212X-16 valve springs. Features RPM Series single spring design, 380 lb/in rate, 1.180 in coil bind, 1.355 in OD, fits Small Block Chevy GM 604 crate engine, set of 16, ideal...

PAC Racing Springs PAC-1371-16 valve springs. Features 1300 Series Circle Track dual spring design, 436 lb/in rate, 1.175 in coil bind, 1.374 in OD, set of 16, ideal for circle track racing.

PAC Racing Springs PAC-R391-16 valve spring retainers. Features 300 Series, 10-degree lock angle, 1.067 in/0.785 in/0.635 in OD steps, 1.459 in OD, dual spring compatible, chromoly, set of 16, ideal...

PAC Racing Springs PAC-1373-16 valve springs. Features 1300 Series Circle Track dual spring design, 670 lb/in rate, 1.150 in coil bind, 1.430 in OD, set of 16, ideal for circle track racing.

PAC Racing Springs PAC-1220-16 valve springs. Features 1200 Series ovate beehive design, 370 lb/in rate, 1.210 in coil bind, 1.000 in/1.445 in OD, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1220X-16 valve springs. Features RPM Series beehive design, 370 lb/in rate, 1.210 in coil bind, 1.000 in/1.445 in OD, set of 16, ideal for high-performance builds.

PAC Racing Springs PAC-1255X-16 valve springs. Features RPM Series ovate beehive design, 408 lb/in rate, 1.220 in coil bind, 0.990 in/1.445 in OD, set of 16, ideal for high-performance builds.

PAC Racing Springs PAC-1427-16 valve springs. Features 1400 Series conical single spring design, 500 lb/in rate, 1.175 in coil bind, 1.104 in/1.454 in OD, set of 16, ideal for high-performance builds.

PAC Racing Springs PAC-R401-16 valve spring retainers. Features 400 Series, 10-degree lock angle, 1.185 in/0.865 in/0.635 in OD steps, triple spring compatible, titanium, +0.050 height, set of 16,...

PAC Racing Springs PAC-1914-16 valve springs. Features Hot Rod Series dual spring design, 367 lb/in rate, 1.1 in coil bind, 1.490 in OD, set of 16, ideal for hot rod performance builds.

PAC Racing Springs PAC-1329 valve spring. Features 1300 Series Drag Race dual spring design, 780 lb/in rate, 1.130 in coil bind, 1.500 in OD, each, ideal for drag racing applications.

PAC Racing Springs PAC-1330 valve spring. Features 1300 Series Drag Race dual spring design, 780 lb/in rate, 1.130 in coil bind, 1.500 in OD, each, ideal for drag racing applications.