Welcome to CMW Racing, home of the largest flat six engine for Porsches (4022 cubic centimeters)! CMW Racing is also known for producing engine components for Porsches such as billet heads, valves, springs, "holey" retainers and more! Lately we have perfected our Four-Liter Conversion for the "flat six" engine. CMW also designs and produces customized engine components for engines other than Porsche, and in such specialized applications as NASCAR and Top Fuel Funny Cars. Our web site has been designed for you to find out the details of our products, as well as to see and hear the difference CMW's quality makes in Porsche engines.