Dual Valve Springs Set (16 Pc)

The Comp Cams CCA-995-16 is a set of 16 dual valve springs engineered for hydraulic roller lifters, compatible with most stock Pontiac cast iron heads. These springs are constructed with an outer diameter of 1.437 inches and an inner diameter of 0.697 inches. Featuring a spring rate of 402 lbs./in, these dual springs provide a seat pressure of 115 lbs. at 1.700 inches and an open pressure of 336 lbs. at 1.150 inches. The advertised coil bind height is 1.020 inches, with an actual measured coil bind height of 0.980 inches when used with a CCA-740-16 retainer. The maximum recommended valve lift is 0.620 inches. Installation notes indicate that cutting valve seats may be required in stock cast iron heads. For hydraulic flat tappet applications, the recommended installed height is 115 lbs. at 1.700 inches. Recommended companion parts include Comp Cams Chromoly Steel Retainers (CCA-740-16) and Comp Cams Valve Locks (CCA-611-16).