Chevy Mercruiser Marine 7.4L 454 IV Cam Camshaft & Lifters Kit STD Rotation

Melling Marine camshaft and E Pro Lifters for 454 Big Block Chevy V8. Equiv. to 3883986. Standard Rotation Specs: Valve Lift (INT/EXH):             .461"/.480" ADV Duration (INT/EXH):      289°/302° Duration @ .050" (INT/EXH): 214°/218° Centerline:                             110°/120° Cam kits with Flat Tappets include a packet of Driven Assembly Grease for lubricating the cam lobe surfaces during assembly and a bottle of Engine Pro Hi-Zinc Engine Protector to add to the engine oil during break in.  It is critical to use High ZDDP/Zinc oil in every oil change on flat tappet engines.