Stronger by design, LN Engineering’s Billet Aluminum Tensioner Paddle for the IMS to crankshaft chain replaces Porsche part no. 996 105 165 54, (55) and is designed to help prevent catastrophic engine failures caused by failure of the cast factory tensioner paddle or the plastic chain tensioner pressure pin (upon which the chain tensioner actuates). Still utilizes OE Porsche wear pad (included) and an upgraded steel pressure pin instead of the inferior OE plastic wear pin. A must for any engine that will see any track use.