Thumpr Ford 3 Valve Cams by COMP Cams

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Testing video of the prototype Thumpr Ford 3 Valve cams by COMP Cams – this one is the Mutha’ Thumpr (Stage...
Testing video of the prototype Thumpr Ford 3 Valve cams by COMP Cams – this one is the Mutha’ Thumpr (Stage 2). These things sound wicked and make power.
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