This billet throttle body flange allows the use of a custom intake manifold on a 2.4 Ecotec engine. This flange is proudly made here in the USA from a solid piece of 6061-T6 aircraft grade aluminum. It is 1/2" thick and milled on every side to ensure a great seal. It is perfect for a race or custom set up. An O-ring and all hardware is included for trouble free bolt on installation.