Valve Springs - HR Series (16) Valve Spring - Hot Rod Series - Dual Spring / Damper - 492 lb/in Spring Rate - 1.130 in Coil Bind - 1.540 in OD - Set of 16

Valve Springs - HR Series (16) Valve Spring - Hot Rod Series - Single Spring / Damper - 376 lb/in Spring Rate - 1.115 in Coil Bind - 1.500 in OD - AMC V8 / Big Block Chevy - Set of 16

Valve Springs - HR Series (16) Valve Spring - Hot Rod Series - Dual Spring - 391 lb/in Spring Rate - 1.050 in Coil Bind - 1.459 in OD - Set of 16

Valve Springs - HR Series (16) Valve Spring - Hot Rod Series - Dual Spring - 392 lb/in Spring Rate - 1.020 in Coil Bind - 1.304 in OD - GM LS-Series - Set of 16

Valve Springs - HR Series (16) Valve Spring - Hot Rod Series - Dual Spring - 370 lb/in Spring Rate - 1.010 in Coil Bind - 1.290 in OD - GM LS-Series - Set of 16

Valve Springs - HR Series (16) 1.555 Dual Valve Spring - Hot Rod Series - Dual Spring / Damper - 469 lb/in Spring Rate - 1.150 in Coil Bind - 1.555 in OD - Set of 16