997 GT3 CUP plate - bevel gear with a ratio of 4,888 for rally use for Porsche 911
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The Porsche 997 CUP crown - bevel gear with a ratio of 4,888 is interchangeable with the original Porsche 997 CUP final drive, which has a ratio of 4.00. This shorter ratio is often used for the rally. The pinion has fewer teeth than the original ratio, which results in greater strength.