Manley 1.640 Dual Valve Springs 221424-16

Manley 1.640 Dual Valve Spring 221424-1Valve Spring - NexTek - Dual Spring - 647 lb/in Spring Rate - 1.070 in Coil Bind - 1.640 in OD - Each

Manley 1.640 Nextek Valve Springs 221425-16Valve Spring - NexTek - Dual Spring - 604 lb/in Spring Rate - 1.150 in Coil Bind - 1.640 in OD - Set of 16

Manley 1.570 Dual Valve Springs 221441P-16Valve Spring - NexTek - Dual Spring / Damper - 575 lb/in Spring Rate - 1.215 in Coil Bind - 1.570 in OD - Polished - Set of 16

Manley 1.560 Dual Valve Springs 221442-16Valve Spring - NexTek - Dual Spring - 533 lb/in Spring Rate - 1.200 in Coil Bind - 1.560 in OD - Polished - Set of 16