Manifold: Edelbrock Performer RPM Chev V8For Chevy Small Block V8. The ultimate in street high performance. Edelbrock Performer RPM intake manifolds have a high rise, dual plane layout, with a 180 degree firing order. Aluminum Natural, Square Bore, Chevy, Small Block. Will not clear stock Corvette hood. No provision for exhaust heated chokes. No exhaust crossover. They produce incredible top end horsepower, while retaining good throttle response. Performer RPMs have larger plenums and