Valve Seat

DIMENSIONS
Oversize
Intake Seat Ring Hole Diameters
0.3 O.S.: 34.30 - 34.33 mm (1.3504 - 1.3516 inch)
0.6 O.S.: 34.60 - 34.63 mm (1.3622 - 1.3634 inch)
Exhaust Seat Ring Hole Diameters
0.3 O.S.: 31.80 - 31.83 mm (1.2520 - 1.2531 inch)
0.6 O.S.: 32.10 - 32.13 mm (1.2638 - 1.2650 inch)
Projection
Standard: 49.30 mm (1.9409 inch)
Limit: 49.80 mm (1.9606 inch)
Seat Contact Width: 0.9 - 1.3 mm (0.035 - 0.051 inch)