This lower plenum is CNC machined and uses a Holley highram style top flange to allow for the use of the 417 Motorsports intercoolers while gaining hood clearance without sacrificing performance. 417 Motorsports billet intake is 6" tall and Holley's high style intake is approximately 8" tall. Uses OEM intake, gaskets and orings. The intake comes with one set of -8 fuel rails. Proven horsepower and torque gain over other leading intake options when paired with the 417 Motorsports sheet metal top (sold separately). Can be used with or without 417 Motorsports intercooler mentioned above.