Performance Valvetrain

PAC Racing Springs PAC-L8028-16 valve locks. Features 10-degree lock angle, 11/32 in valve stem, standard height, steel with black oxide finish, radius groove type, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1248-16 – 1200 Series Drag Race Triple Valve Springs Upgrade your engine with PAC Racing’s 1200 Series Drag Race triple valve springs, designed for high-performance drag racing applications. These springs deliver...

PAC Racing Springs PAC-R658-16 valve spring retainers. Features 600 Series, 8-degree lock angle, 1.120 in/0.715 in OD steps, 1.450 in OD, dual spring compatible, Pacaloy steel, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1224-16 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-R650-16 valve spring retainers. Features 600 Series, mini 8-degree lock angle, 0.940 in/0.685 in OD steps, 1.250 in OD, dual spring compatible, steel with natural finish, set of 16, ideal for performance builds.

PAC Racing Springs PAC-KS94 valve spring shim kit. Features 0.015/0.020/0.030/0.050 in thick shims, 1.500 in OD, 0.570 in ID, steel, 64 pieces, ideal for precise valve spring adjustments in performance builds.

PAC Racing Springs PAC-R335-16 valve spring retainers. Features 300 Series, 7-degree lock angle, 0.940 in/0.680 in OD steps, 1.300 in OD, dual spring compatible, chromoly, fits GM LS-Series, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S109-16 valve spring retainers. Features inside design, 0.060 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-1219-16 valve springs. Features 1200 Series ovate beehive design, 340 lb/in rate, 1.100 in coil bind, 0.885 in/1.307 in OD, fits GM LS-Series, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1200-16 valve springs. Features 1200 Series Circle Track single spring with damper, 450 lb/in rate, 1.100 in coil bind, 1.244 in OD, set of 16, ideal for circle track racing.

PAC Racing Springs PAC-L8005-16 valve locks. Features 10-degree lock angle, 11/32 in valve stem, -0.050 height, titanium with natural finish, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S135-16 valve spring retainers. Features inside design, 0.060 in thick, 1.270 in OD, 0.570 in ID, 0.680 in spring ID, chromoly, set of 16, ideal for performance builds with RPM dual springs.