Edelbrock 5002 Torker-Plus Camshaft and Lifter Kit Use only stock ratio rocker arms Designed to work with Edelbrock's Torker II manifolds for performance from 2,500 to 6,500 RPM Ideal for high-performance street, drag or marine applications Intake duration at 0.050 lift is 232 degrees and the exhaust duration is 234 degrees Intake and exhaust valve lift with factory rocker arm ratio is 0.488