106-10 LN Engineering's billet aluminum tensioner blade/paddle for the IMS to crank chain. Replaces Porsche part 99610516555 and is designed to help prevent catastrophic engine failure caused by failure of the factory cast tensioner paddle or the plastic chain tensioner push pin (which the chain tensioner operates on). Still utilizes OE Porsche wear pad (included) and an improved steel push pin in place of the inferior OE plastic wear pin. A must for any engine rebuild. Item 18 in diagram