S3 cylinder head for low compression TRS to improve low end performance and sweeten high speed response. With this cylinder head the BPR5ES spark plug must be installed and can be installed using the original TRRS cylinder head.
Original S3 part
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Woodruff key Sherco and Scorpa from 2011
Woodruff key valid for Sherco all models and Scorpa from 2011 (Sherco engine). It is easy to put on.
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