This Melling hydraulic flat tappet camshaft is specifically designed for Oldsmobile V8 engines and offers a rough idle quality. With an intake lift of 0.474 and an exhaust lift of 0.474, this camshaft falls under the Class 3 category for camshaft stage. The approximate power range for this camshaft is between 2500 to 6000 RPM, making it a performance part for your engine. The camshaft is made of flame hardened casting material and is coated with manganese phosphate for added protection. It comes with an intake duration of 232 @ .050" and an exhaust duration of 232 @ .050", with an intake center line of 112 and an exhaust center line of 114. The package includes only the camshaft.