Shuffle pining on the magnesium Porsche engine case is a proven modification in the endurance racing arena when the cases have this modification done on them the chafing problem on the case half's stops On high HP applications I feel this operation is a must along with align honing main bearing bores to true them up

This modified stock cover is a must for between round clutch maintenance

The extension is completely welded 360 degrees and the cover plate is o ring sealed

A core exchange program is available