Edelbrock part #7138 Pro-Flo XT intake manifold is designed for 1957-86 S/B Chevy swapped with E-Tec/Vortec heads or 1996 and later Vortec Engines. This Pro-Flo XT intake is engineered with a large plenum and long tapered runners to deliver maximum horsepower and broad torque throughout the rpm range (1500-7000 rpm). Pro-Flo XT EFI intakes accept Edelbrock Pro-Flo XT Throttle Bodies and Fuel Rails (Sold Separately).