Edelbrock part 71383 Pro - Flo XT intake manifold is for 1957 - 86 SB Chevy swapped with E - TecVortec 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. This manifold offers a durable black power coated finish for long lasting protection and a distinctive look.