COMP Cams 1.550" Spring Seat Cutter - Cuts Guide: .630" BR10122 Stilo Helmet

Stilo Helmet

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Ford Mustang 2011-13

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COMP Cams 1.550" Spring Seat Cutter - Cuts Guide: .630" BR10122 Stilo HelmetMost 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