Description COMP Thumpr Camshaft 64-77 Ford Mercury 352-428ci V8 -cca33-600-5.

Thumpr 226/241 Hydraulic Flat Cam for Ford 352-428Exhaust Duration:304Intake Duration:286Assembly Lubricant Included:YesBasic Operating RPM Range:2,000-5,800Cam Type:Hydraulic Flat TappetCamshaft Gear Attachment:1-BoltCamshaft Material:Cast IronCamshaft Series:ThumprEngine Family:Ford 352-428 c.i. 8 Cylinder (1963-1977)Exhaust Duration at .050 inch Lift:249Exhaust Valve Lift:0.515Grind Number:279TH7Intake Duration at .050 Inch Lift:234Intake Valve Lift:0.519Lifter Style:Hydraulic Flat TappetLifters Included:NoLobe Separation:107Usage:Street/PerformanceValve Springs Required:YesK-Kit Upgrade:K33-600-5 Cam and Lifter Kit Upgrade:CL33-600-5.

*Thumpr Camshafts* * Three unique cam designs for each application that deliver excellent horsepower gains and broad torque curve; perfect choice for muscle cars and street rods * Early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note * Best with aftermarket converters and more rear gear.