Valve Guide

Valve Guide:
Inner Diameter 6.0 mm (0.315 inch)
Outer Diameter 11.0 mm (0.433 inch)
Oversize Valve Guide Hole (Both Intake and Exhaust):
0.05 11.05 - 11.07 mm (0.4350 - 0.4358 inch)
0.25 11.25 - 13.32 mm (0.4429 - 0.4457 inch)
0.50 11.50 - 11.52 mm (0.4528 - 0.4535 inch)