The Full Tilt ’03-07 ISX Intake manifold features a wide, graduated style that allows your engine to get as much fresh clean air as it needs. It was also developed with four directional veins to prevent the air from becoming turbulent and slowing down. The engineers are proud to say that this is the highest flowing intake out there with an increase of more than 85% more Cubic Feet of air Per Minute (CFM) than OEM. It has been cast out of high grade aluminum and made to allow for a quick easy replacement of your stock intake.