PAC Racing Hot Rod Series Valve Spring Dual Spring 392 lb/in Spring Rate 1.020" Coil Bind - 1.304" OD H759003XXL HP or Dominator ECU requires

HP or Dominator ECU requires V5 Build 100 or newer software/ firmware

1971-1974 Monteverdi 450 SS

Floor mount for latch type restraint systems

fits over existing plastic fuse box lid

thus losing ride height and rate

PAC Racing Hot Rod Series Valve Spring Dual Spring 392 lb/in Spring Rate 1.020" Coil Bind - 1.304" OD H759003XXL HP or Dominator ECU requiresProduct Description: 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 PAC Racing Springs is part of the Race Winning Brands Family. With more than 100 years of spring manufacturing experience. We understand the demands of racing and provide a commitment to all of our customers to provide the best service possible. We continue to expand products and offer expanded onsite technical