Plain Plug Gauge for Sleeve ID Go 3.203 to 3.205 Cyl. 0.001 Len. 25 to 26; with tapping of M2; NOGO 3.295 to 3.3 Cyl. 0.002 Len. 10 to 11 / Std. Gauging area should have lapped finish. Gauge No. PPG 3200.3300