Performance Valvetrain

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.

PAC Racing Springs PAC-R505-16 valve spring retainers. Features 500 Series, 10-degree lock angle, 1.090 in/0.780 in OD steps, dual spring compatible, titanium, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1222X-16 valve springs. Features RPM Series dual spring design, 425 lb/in rate, 1.055 in coil bind, 1.280 in OD, fits GM LS-Series, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1237X-16 valve springs. Features RPM Series dual spring design, 550 lb/in rate, 1.045 in coil bind, 1.274 in OD, fits GM LS-Series, set of 16, ideal for performance builds.