Edelbrock part #7138 Pro-Flo XT intake manifold is for 1957-1986 SBC swapped with E-Tec/Vortec heads or 1996 and later Vortec Engines. The Pro-Flo XT intakes are 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.