Howards Performance Hydraulic Roller Dual Valve Springs - 300 lb/in - 1.437 OD H775C30XXL Famed racers such as Bill

Famed racers such as Bill "Grumpy" Jenkins

Diaper is NHRA approved but is not designed for vehicles that require SFI approved diapers

Centerforce brings together high-quality friction materials and patented processes to give you top-of-the-line discs

1967 Oldsmobile Cutlass Supreme CID 294 4

1966-1980 Chevrolet Caprice

Howards Performance Hydraulic Roller Dual Valve Springs - 300 lb/in - 1.437 OD H775C30XXL Famed racers such as BillProduct Description: Valve Spring Dual Spring Damper 300 lb in Spring Rate 1. 125 in Coil Bind 1. 437 in OD Set of 16 The name Howards Cams has been synonymous with high performance camshafts since the 1950s. Howards Cams have always used on track experience to design the most powerful designs. This includes early Top Fuel favorites driven by Jack Chrisman and Larry Dixon Sr. Today we have even a greater group of experienced racers in Circle Track,