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COMP Cams

COMP Cams Seat Cutter For Gm Vortec Hea

MPN: 4721cpg Catalog #: 001593991 Category: Tools Check Vehicle Fitment

Product Details

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 5/16, 11/32 and 3/8 valve stem sizes.

Valve Spring Seat Cutter - 0.775 in OD Guide - 1.350 in OD Valve Seat - Steel / Carbide - GM Vortec Head - Each

Most high performance engines today require the use of larger-than-stock diameter valve springs. This 1.350 Spring Seat Cutter for installing single springs on GM Vortec Heads without hardened spring seats will allow the engine builder to machine the cylinder head to the proper size for your spring. Each cutter requires the use of an arbor/pilot, which are available in three different sizes.

Cuts spring seat to 1.350 O.D.; Cuts guide to .775; Cuts seat to install larger springs and hardened spring seats on GM Vortec heads without hardened spring seats; Other seat cutters available in many sizes from 1.350 to 1.810 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.

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

COMP Cams 1.350 Spring Seat Cutter for Vortec Heads, .775 Guide

Seat Cutter Vortec 1.35 Seat .775 Guide

COMP Cams Seat Cutter For Gm Vortec Hea

Seat Cutter, for GM Vortec Head

Engine Valve Seat Cutter

Valve Seat Cutter

None

Vehicle Fitment

Universal or product-specific fitment. Please review the product details and contact us if you need help confirming fitment before ordering.

Engine Compatibility

GM - VortecMatched variant: Vortec

Truck Vortec V8; 4.8/5.3/6.0

Fitment note: Engine compatibility is provided as a guide. Please verify all fitment details before ordering.

Product Specs

Brand
COMP Cams
Part Number
4721cpg
Catalog Number
001593991
Product Line
Tools
Category
Fab, Tools & Shop Equipment
Type
Tools
UPC / Barcode
036584079125
Vendor Product Category
Tools
Vendor Product Subcategory
Tools
Length
6.15 in
Width
3.50 in
Height
1.20 in
Weight
0.24 lb
Units Per SKU
1
Freight / LTL
No
Ship Alone
No
Air Restricted
No
Prop 65
Y
CARB Approved
Yes
Clearance Item
No

Shipping & Availability

Current status 82 Available - Ready to ship
Estimated timing Usually ships within 24hrs

This item is showing available inventory. Most in-stock performance parts ship quickly, but timing can vary by warehouse, vendor cut-off time, holidays, and carrier pickup.

PROP 65 WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Inventory shown: 82 available as of 6/4/2026.

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