COMP Cams Seat Cutter For GM Vortec Hea - 4721CPG

Spring Seat Cutter for GM Vortec - 1.350" Spring Seat O.D. .775" Guide O.D.

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.

Cuts cylinder head spring seats to 1.350" diameter / Cuts to .775" inner diameter. For installing larger springs and hardened spring seats on GM Vortec heads. Requires the use of an arbor/pilot, which are available for <a href="https://www.raptorracing.ca/catalogsearch/result/?q=4730&Category_Code=">5/16"</a>, <a href="https://www.raptorracing.ca/catalogsearch/result/?q=4732&Category_Code=">11/32"</a> and <a href="https://www.raptorracing.ca/catalogsearch/result/?q=4734&Category_Code=">3/8"</a> valve stem sizes.

These tools from COMP Cams will allow machining of the cylinder head to the proper size for your spring. Each cutter requires the use of an arbor/pilot, which is available in three different sizes. These arbors/pilots will

• Valve guide cutters available to cut guide to .446", .494", .500", .530" or .625"
• Seat cutters available in many sizes from 1.320"-1.810" O.D.
• Arbors/pilots available for 5/16", 11/32" and 3/8" diameters