PAC Racing Springs PAC-T900 calibration springs. Features a kit with data sheet, designed for PAC valve spring testers, ensures accurate spring rate testing, ideal for performance tuning.

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,...

PAC Racing Springs PAC-KS16 valve spring kit. Features dual spring, 392 lb/in rate, 1.020 in coil bind, 1.304 in OD, includes chromoly retainer, locks, Viton seal, steel seat, fits GM LS-Series,...

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-T903 valve spring height gauge. Features 1.400-1.900 in range, 1.200 in ID, 0.050 in per turn, orange anodized finish, ensures precise measurements, sold as each.

PAC Racing Springs PAC-T901 valve spring height gauge. Features 1.400-2.000 in range, 0.001 in scale, blue anodized finish, ideal for beehive springs, ensures precise measurements, sold as each.

PAC Racing Springs PAC-T902 valve spring height gauge. Features 1.800-2.600 in range, 0.001 in scale, red anodized finish, ensures precise measurements for performance builds, sold as each.

PAC Racing Springs PAC-T904 valve spring height gauge. Features 1.400-2.000 in range, 0.001 in scale, purple anodized finish, designed for GM LS dual springs, ensures precise measurements, sold as...

PAC Racing Springs PAC-KS93 valve spring shim kit. Features 0.015/0.020/0.030/0.050 in thick shims, 1.250 in OD, 0.570 in ID, steel, ideal for precise valve spring adjustments in 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...

PAC Racing Springs PAC-KS92 valve spring shim kit. Features 0.015/0.020/0.030/0.050 in thick shims, 1.500 in OD, 0.645 in ID, steel, 64 pieces, ideal for precise valve spring adjustments in...

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