Manley 1.620 Dual Valve Springs - Polished 851001 Just provide the relays and

Just provide the relays and fuses and let the XFI do the rest

adjustable by 10 RPM increments - including Launch Lite

Clear/Smoke/Black

We offer more styles

Manley 1.620 Dual Valve Springs - Polished 851001 Just provide the relays andProduct Description: Valve Spring NexTek Dual Spring 500 lb in Spring Rate 1. 200 in Coil Bind 1. 620 in OD Polished Set of 16 Manley Performance high performance and racing engine parts have been powering winners since 1966. Since our inception in March 1966, Manley Performance Products has been at the forefront of the high performance automotive industry. Founded by gearhead Hank Manley shortly after his graduation from Brown University, our journey