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Adjustable internal cam sprocket for all 5-valve VW and Audi engines, replaces the cam driven sprocket on the exhuast cam to allow lobe center and advance/retard adjustments of cams. Presses over stock camshaft.
Price Each, can only be used on the exhaust cam which gives ample adjustment range.
This is a very nice and affordable way to get more out of stock cams or cams you already have, allows full adjustability.