Isky Cams Endurance Plus„¢ Dual Valve Springs W, Damper (16) - 1.530" O.D. - 420 lbs., "Rate - 1.160" Coil Bind Rear End Housing Mount Bushing We all love our Holley

We all love our Holley carburetors

Excellent Modulation And Release Characteristics

2012-2016 Ford F-250 Super Duty

Lower radiator mounting brackets are included

16 AN Female to 16 AN Male

Isky Cams Endurance Plus„¢ Dual Valve Springs W, Damper (16) - 1.530" O.D. - 420 lbs., "Rate - 1.160" Coil Bind Rear End Housing Mount Bushing We all love our HolleyThe Endurance Plus series of valve springs utilizes a specially processed Tool Room Material outer spring for increased endurance reliability beyond the "SP" series. Endurance Plus springs are designed for late models, modifieds, etc. , and are Spintron Test Proven up to 8400 rpm for 850 racing miles. As the world's largest racing, performance, and economy cam manufacturer, Isky maintains a dynamometer testing program for constant improvement of