Performance Valvetrain

PAC Racing Springs PAC-R506-16 valve spring retainers. Features 500 Series, 10-degree lock angle, 1.090 in/0.695 in OD steps, dual spring compatible, titanium, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1282LX-16 valve springs. Features RPM Series ovate beehive design, 400 lb/in rate, 1.544 in coil bind, 0.825 in/1.270 in OD, fits 7.3L Godzilla engine, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1228-16 valve springs. Features 1200 Series Drag Race dual spring design, 629 lb/in rate, 1.100 in coil bind, 1.625 in OD, set of 16, ideal for drag racing applications.

PAC Racing Springs PAC-1208X-16 valve springs. Features RPM Series dual spring design, 460 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-R355-16 valve spring retainers. Features 300 Series, 7-degree lock angle, 0.920 in/0.650 in OD steps, 1.280 in OD, dual spring compatible, chromoly, fits GM LS-Series, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R464-16 valve spring retainers. Features 400 Series, 0.795 in/0.517 in OD steps, single spring compatible, titanium, fits Ford Modular, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8048-16 valve locks. Features 10-degree lock angle, 5/16 in valve stem, standard height, titanium with natural finish, radius groove, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S186-16 valve spring shims. Features 0.020 in thick, 1.500 in OD, 0.570 in ID, steel, set of 16, ideal for precise valve spring adjustments in performance builds.

PAC Racing Springs PAC-1235-16 valve springs. Features 1200 Series ovate beehive design, 358 lb/in rate, 1.160 in coil bind, 0.805 in/1.210 in OD, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R509-16 valve spring retainers. Features 500 Series, 8-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-1225 valve spring. Features 1200 Series Drag Race dual spring design, 644 lb/in rate, 1.150 in coil bind, 1.550 in OD, each, ideal for drag racing applications.

PAC Racing Springs PAC-1214-16 valve springs. Features 1200 Series ovate beehive design, 275 lb/in rate, 1.040 in coil bind, 0.698 in/1.061 in OD, fits Ford Modular, set of 16, ideal for performance builds.