Design

D-port aluminum billet heads feature a smaller, more efficient exhaust port size (patented by Cousimano).

Intake valves are available in sizes ranging from 52mm to 56mm while exhaust valves are only available in 43mm and are made of heat resistant Incennel. Valve springs, drilled "holey" retainers, and guides are specifically designed by CMW ("factory" seals are retained).

Cylinder bore and stroke are 102mm and 82mm respectively. Connecting rods feature a precise width in order to clear the stock oil pump, thus retaining as many factory internal engine components as possible. Wrist pins are specially designed to sustain high torque.

A special billet crankshaft is also used in this conversion. Its' knife-edged design is center counter weighted and is eight pounds lighter than a factory 3.6 liter crankshaft (less reciprocating mass=higher throttle response). Camshafts feature a moderate profile very close to production specifications in order to satisfy emissions requirements.

Special 11.5 to 1 compression pistons and piston rings with a low drag coefficient complete the four-liter conversion.

A sequential fuel management system, intake manifold, "winged" intake port inserts and even a cylinder bore size of 104mm are being considered as future conversion options for the "flat-six" engine.