Performance Valvetrain

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.

PAC Racing Springs PAC-S113-16 valve spring retainers. Features inside design, 0.060 in thick, 1.450 in OD, 0.630 in ID, 0.980 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R317-16 valve spring retainers. Features 300 Series, 10-degree lock angle, 0.990 in/0.700 in OD steps, 1.374 in OD, dual spring compatible, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R333-16 valve spring retainers. Features 300 Series, 7-degree lock angle, 0.640 in OD step, beehive spring compatible, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R387-16 valve spring retainers. Features 300 Series, 10-degree lock angle, 1.122 in/0.735 in OD steps, 1.450 in OD, dual spring compatible, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S119-16 valve spring retainers. Features inside design, 0.060 in thick, 1.550 in OD, 0.575 in ID, 0.800 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S129-16 valve spring retainers. Features inside design, 0.060 in thick, 1.270 in OD, 0.520 in ID, 0.680 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8143-16 valve locks. Features 8-degree lock angle, 8 mm valve stem, -0.050 height, steel with black oxide finish, radius groove, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8146-16 valve locks. Features 7-degree lock angle, 11/32 in valve stem, standard height, steel with black oxide finish, square groove, set of 16, ideal for performance builds.