COMP Cams 1.550" Spring Seat Cutter - Cuts Guide: .630" 38500310 Not compatible with Vacuum/Boost gauges

Not compatible with Vacuum/Boost gauges

1972-1974 Pontiac Catalina

Designed specifically for short track use

Governor Recalibration Kit For TH-700R4

COMP Cams 1.550" Spring Seat Cutter - Cuts Guide: .630" 38500310 Not compatible with Vacuum/Boost gaugesMost high performance engines today require the use of larger than stock diameter valve springs. This 1. 550" 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 pilot, which are available in three different sizes. This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1. 550" outer diameter while reducing the