Edelbrock Rollin Thunder Camshaft Hydraulic Roller Gen Vi B/B Chevy 500+ CIEdelbrock Rollin' Thunder Camshaft #2264 is designed for 500+ Gen VI engines from 1996 Later and produce optimum torque from the low end to the mid range. Rollin' Thunder camshafts match with Performer manifolds for vehicles operating from off idle to 5500 rpm. They are smooth idling cams for daily drivers, trucks, vans, RVs and 4x4s. You can expect a major improvement in throttle response and torque. In the manifold section you'll find torque graphs