{"product_id":"034motorsport-1-piece-pinned-unpinned-crank-hub-w-crank-bolt-capture-plate-4-pin-bmw-n55-s55","title":"034Motorsport 1-Piece, Pinned \u0026 Unpinned Crank Hub w\/ Crank Bolt Capture Plate 4 Pin - BMW N55 \u0026 S55","description":"\u003ch3\u003eUnmatched Engineering. Zero Compromise:\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eA Permanent Fix for the Factory Crank Hub Problem\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe factory crank hub used in BMW’s N55 and S55 engines is a well-known weak point, particularly as power levels increase. The OEM design uses three individual sprocketed pieces that drive the timing chains off the crankshaft. Importantly, none of these sprockets are mechanically linked together nor to the crankshaft. They rely only on friction washers and the clamping force of the crank bolt to stay aligned.\u003c\/p\u003e\u003cp\u003eThe 034Motorsport 1-Piece Pinned Crank Hub replaces the entire multi-piece factory stack with a single CNC-machined billet EN36 steel unit. By combining all timing sprockets into one rigid body, every driven timing component remains physically linked, eliminating the possibility of internal hub slip.\u003c\/p\u003e\u003cp\u003eThe same hub can be installed pinned or unpinned. The kit includes a Crank Bolt Capture Plate, carbide drill bit, drill guide and alignment jig.\u003c\/p\u003e","brand":"034Motorsport","offers":[{"title":"Default Title","offer_id":56258462908801,"sku":"034-113-Z015","price":899.64,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0516\/8457\/3378\/files\/034-113-Z015.jpg?v=1789413729","url":"https:\/\/jbmperformance.co.uk\/products\/034motorsport-1-piece-pinned-unpinned-crank-hub-w-crank-bolt-capture-plate-4-pin-bmw-n55-s55","provider":"JBM Performance","version":"1.0","type":"link"}