Angle-milling cylinder heads is one of the best ways to take existing equipment and make it work better. Almost all racers understand the concept-angle-milling is essentially decking a head on an ...

For a high-performance street car, at a minimum you want a precision, three-angle valve job with relatively wide seats able to stand up to years of hot rodding. Quickie parts-store valve jobs won't ...

An internal combustion engine is like a big air pump, and the more air you can get it to pump, the more torque and horsepower it will make. Things like bigger camshafts, aftermarket intakes and ...

As with most things in life, it’s the details that make the difference. You might not think that a measly degree here or there could make more horsepower when it comes to a valve job, but there’s ...

As a Tier Two vendor in off-highway equipment and producer of hydraulic-valve spools, Trotter Machine Inc. of Rockford, Ill., often runs hard chrome-plated steel through its facility, consistently ...