Spectre Air Intake Kits are available for a number of applications and are designed to fit your classic muscle car. Manufactured from high quality polished aluminum, the plenum fits carburetors and TBI throttle bodies with a 5-1/8 inch inlet. The plenum attaches to the 4 inch outside diameter aluminum air intake tube. The tube is Spectre part 97997 which makes a 150 degree Y to two 6 inch legs for the air filters to attach to. Always check for proper clearance between the neck of the carburetor/TBI and the bottom of the hood before closing the hood. 2 worm gear clamps and a coupler are included to complete installation. Spectre Air Intake Kits are available for a number of applications and are designed to fit your classic muscle car. Made from high quality polished aluminum and includes clamps and couplers to complete installation.