90 Quattro 20V (Canada) L5-2309cc 2.3L DOHC (7A) (1989)
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Valve: Specifications
Maximum Refacing Dimension [1]
Minimum
Intake Valve .................................................................................................................................................................................. 36.0 mm (1.417 in)
Exhaust Valve ................................................................................................................................................................................ 36.3 mm (1.429 in)
[1]
Measured from center of valve stem and upper edge of cylinder head.