Edelbrock Hydraulic Roller Camshaft for 1987 And Later Gen-I Small-Block ChevyEdelbrock Rollin' Thunder Camshaft #2207 is designed for 283 400 V8 Chevy engines from 1987 Later and produces optimum torque from the low end to the mid range. Rollin' Thunder camshafts should be matched 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