Performance Valvetrain

PAC Racing Springs PAC-S133-16 valve spring retainers. Features inside design, 0.030 in thick, 1.650 in OD, 0.570 in ID, 0.630 in spring ID, chromoly, set of 16, ideal for performance builds.

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 for performance builds.

PAC Racing Springs PAC-1258-16 valve springs. Features 1200 Series Drag Race triple spring design, 688 lb/in rate, 1.130 in coil bind, 1.645 in OD, set of 16, ideal for drag racing applications.

PAC Racing Springs PAC-1283-16 valve springs. Features 1200 Series ovate beehive design, 363 lb/in rate, 1.080 in coil bind, 0.845 in/1.250 in OD, fits Viper V10, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R511-16 valve spring retainers. Features 500 Series, 7-degree lock angle, 0.640 in OD step, beehive spring compatible, titanium, fits GM LS-Series, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S111-16 valve spring retainers. Features inside design, 0.060 in thick, 1.270 in OD, 0.570 in ID, 0.870 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-KS15 valve spring kit. Features dual spring, 370 lb/in rate, 1.010 in coil bind, 1.290 in OD, includes chromoly retainer, locks, Viton seal, steel seat, fits GM LS-Series, ideal for performance builds.

PAC Racing Springs PAC-R310-16 valve spring retainers. Features 300 Series, 10-degree lock angle, 0.640 in OD step, beehive spring compatible, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S128-16 valve spring retainers. Features inside design, 0.060 in thick, 1.270 in OD, 0.520 in ID, 0.600 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R508-16 valve spring retainers. Features 500 Series, 10-degree lock angle, 1.040 in/0.715 in OD steps, dual spring compatible, titanium, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8065 valve lock. Features 10-degree lock angle, 5/16 in valve stem, -0.050 height, steel with black oxide finish, each, ideal for performance builds.

PAC Racing Springs PAC-1225-16 valve springs. Features 1200 Series Drag Race dual spring design, 644 lb/in rate, 1.150 in coil bind, 1.550 in OD, set of 16, ideal for drag racing applications.