Overview Reviews Product Description This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.350" outer diameter while reducing the outer diameter of the valve guide to .775". Ideal for installing single springs on GM Vortec head. Product Videos Custom Field MPN 4721CPG EPA N/A Product Reviews Write a Review Write a Review × COMP Cams COMP Cams Seat Cutter For Gm Vortec Hea - 4721CPG Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *
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