CHEVY 283 V8 4.6L. VALVE SEAT CUTTERS KIT CARBIDE TIPPED. KIT CONSIST OF AS BELOW. INTAKE 1.760 – 45 DEG. EXHAUST 1.540 – 45 DEG. THROAT ANGLE CUTTER 1.625 70 DEG. GUIDE STEM GUIDE STEM 343. GUIDE REAMER HSS 343. PLEASE FEEL FREE TO ASK ANY QUESTIONS.