Since no two CNC programs are the same and even a skilled machinist probably can't identically hand-port two sets of heads, the intake-runner openings and the intake ports on the heads rarely line up.

A detailed investigation of the influence of intake port design on the incylinder flow structure during the intake and compression strokes, the mixing of the residual gas and a non-premixed intake ...

"In 2003, we were the first company to develop an upgraded upper intake plenum for the '96-and-up Two-Valve 4.6L Mustang, and that product was a huge success at the time," says C&L Performance's ...

A variable swirl intake port system for 4 valves/cylinder direct injection diesel engines was developed. This system combines two mutually independent intake ports, one of which is a helical port for ...

Mike agreed that with some work it could be done, so together they tackled the job of designing, engineering, and building a port-injected cross-ram intake manifold.