A Cummins engine's internal airflow—and methods of improving it—was the main topic of our recent discussion with Zach Hamilton, maker of the only high-performance, 12-valve cylinder head available for Cummins powerplants.We're all familiar with the role injectors and turbochargers play in increasing a diesel engine's horsepower. However, when camshafts and cylinder heads are thrown in the mix, the familiarity isn't nearly as strong for many enthusiasts. A Cummins engine's internal airflow—and methods of improving it—was the main topic of our recent discussion with Zach Hamilton, maker of the only high-performance, 12-valve cylinder head available for Cummins powerplants.

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Photo Gallery: An In-Depth Look At Hamilton Cams' 12-Valve Cummins Cylinder Head

Photo Gallery: An In-Depth Look At Hamilton Cams' 12-Valve Cummins Cylinder Head



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