Performance Valvetrain

PAC Racing Springs PAC-1370-16 valve springs. Features 1300 Series Drag Race dual spring design, 836 lb/in rate, 1.230 in coil bind, 1.550 in OD, set of 16, ideal for drag racing applications.

PAC Racing Springs PAC-1916-16 valve springs. Features Hot Rod Series dual spring with damper, 436 lb/in rate, 1.135 in coil bind, 1.538 in OD, set of 16, ideal for hot rod performance builds.

PAC Racing Springs PAC-1355H-16 valve springs. Features 1300 Series Drag Race dual spring design, 780 lb/in rate, 1.130 in coil bind, 1.500 in OD, set of 16, ideal for drag racing applications.

PAC Racing Springs PAC-1230X-16 valve springs. Features RPM Series ovate beehive design, 291 lb/in rate, 1.089 in coil bind, 0.720 in/1.083 in OD, set of 16, ideal for high-performance builds.

PAC Racing Springs PAC-R536-16 valve spring retainers. Features 500 Series, 10-degree lock angle, 1.125 in/0.800 in OD steps, dual spring compatible, titanium, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1529-16 valve springs. Features 1500 Series circle track dual spring design, 560 lb/in rate, 1.090 in coil bind, 1.284 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 for performance builds.

PAC Racing Springs PAC-1218-16 valve springs. Features 1200 Series ovate beehive design, 313 lb/in rate, 1.140 in coil bind, 0.885 in/1.290 in OD, fits GM LS-Series, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1333-16 valve springs. Features 1300 Series drag race dual spring design, 673 lb/in rate, 0.971 in coil bind, 1.274 in OD, set of 16, ideal for drag racing applications.

PAC Racing Springs PAC-1209X-16 valve springs. Features RPM Series dual spring design, 500 lb/in rate, 1.000 in coil bind, 1.324 in OD, fits GM LS-Series, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1233-16 valve springs. Features 1200 Series ovate beehive design, 300 lb/in rate, 1.060 in coil bind, 0.662 in/1.025 in OD, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S127-16 valve spring retainers. Features inside design, 0.030 in thick, 1.500 in OD, 0.630 in ID, 0.715 in spring ID, chromoly, set of 16, ideal for performance builds.