Holley Carburetor Rebuild Kit - Marine - For Holley RG40003XL With a patented orifice metering

With a patented orifice metering valve and a lightweight check valve disc these High Energy hydraulic flat lifters for Chevrolet Small/Big Block/348-409 provides quicker response and better performance

Cast iron head

2" or 3" Rear Drop

Center of the tube and outside

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