VALVE SEAT RESTORATION KIT. SBC SMALL BLOCK CHEVY MODIFIED 2.02-1.60 30-45-60. 3 ANGLE CUT AS OEM VALVE SEAT. 3 x 2.020 30, 45 & 60 Degree for Intake. 1.600 30, 45 & 60 Degree for Exhaust. 5/16″, 3/8″, 11/32 VALVE GUIDE REAMER HSS. 1x THREAD CLEANER TAP. PLEASE FEEL FREE TO ASK ANY QUESTIONS.