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Engine Pro Performance Nitro Black Series Push Rods 3121S9100 Specifications
All Engine Pro valve springs are manufactured using the highest quality chrome silicon or high tensile chrome silicon vanadium alloy materials
Engine Pro Performance Nitro Black Series Push Rods 3121S7400 Specifications
1987-89 (Vin Code 1)
ARP Chevrolet big block (aluminum heads) 135-7202 Engine Pro Performance Nitro Black135 7202 Chevrolet big block (aluminum heads) Specifications Base Thread Length (in.) 0. 85 Base Thread Size (in.) 7 16 14 Effective Stud Length (in.) 2. 35 Guideplate Locator Shank Yes Rocker Arm Nut Thread Length (in.) 0. 85 Rocker Arm Nut Thread Size (in.) 7 16" 20 Applies to: B