Nick Priegnitz with Duramax Tuner and Calibrated Power Solutions has done some real world testing on these new Edelbrock Cylinder heads.

The Edelbrock heads are unique for the Duramax Platform as they are the only true aftermarket casting for cylinder heads. They have been upgraded in many ways including a cup-less design, upgraded valve springs, inconel and stainless valves, and improved air flow.

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