PAC Racing Springs PAC-1904-16 valve springs. Features Hot Rod Series dual spring design, 370 lb/in rate, 1.010 in coil bind, 1.290 in OD, set of 16, ideal for hot rod performance builds.

PAC Racing Springs PAC-1905-16 valve springs. Features Hot Rod Series dual spring design, 392 lb/in rate, 1.020 in coil bind, 1.304 in OD, set of 16, ideal for hot rod performance builds.

PAC Racing Springs PAC-1908-16 valve springs. Features Hot Rod Series dual spring design, 417 lb/in rate, 0.910 in coil bind, 1.465 in OD, set of 16, ideal for hot rod performance builds.