509S: 74”-84” Shovelhead high output cam. Best with 9.5+:1 compression, ported heads and high flow carb. Extra-wide torque curve with great horsepower numbers. Solid or aftermarket hydraulic lifters required.


Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.

Weight 1 lbs

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