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Sierra Needle and Seat
33-Percent heavier so it can be stitched without a hoop
Kits materials include MLS
no drill installation
Competition Cams 4718 1.440" Spring Seat Cutter.630" Guide 762931828060 Sierra Needle and SeatBrand Comp Cams Model 4718 Cuts spring seat to 1. 440 inch O. D. Cuts guide to . 630 inch Other seat cutters available in many sizes from 1. 350 inch to 1. 810 inch O. D. Most high performance engines today require the use of larger than stock diameter valve springs. This 1. 440 inch Spring Seat Cutter from COMP Cams 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
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