Edelbrock part #71363 Pro-Flo XT EFI intake manifold is engineered for high performance 396-502 c.i.d. Chevy V8's with rectangular-port cylinder heads. A large plenum and tapered runners deliver maximum horsepower and broad torque throughout the rpm range (1500-6500 rpm). It features a 90mm throttle body opening for maximum performance. This manifold offers a durable black power coated finish for long lasting protection and a distinctive look.