Insane Performance BMW S55 4-Pin One-Piece Crank Hub
Insane Performance one-piece 4-pin crank hub upgrade for the BMW S55 engine. Designed for S55-powered BMW M2 Competition, M3 and M4 models, the Insane Performance crank hub replaces the factory multi-piece crank hub arrangement with an upgraded one-piece design that can be mechanically located to the crankshaft using four pins. £799 including VAT – component kit only. Professional Installation Available Looking for the complete crank hub upgrade rather than the component on its own? Swift Performance offers the Insane Performance 4-pin crank hub supplied and professionally installed for £1,950 including VAT at our workshop in Stoke Mandeville, Aylesbury. Our complete package includes the crank hub, professional installation, associated gaskets, seals and fixings, engine oil, S55 oil filter and our sump-removal installation procedure. View our £1,950 S55 Crank Hub Supply & Fit Package About the Insane Performance S55 4-Pin Crank Hub The Insane Performance S55 crank hub is a one-piece upgraded crank hub designed specifically for BMW's S55 engine. Insane Performance specifies the hub as manufactured from heat-treated steel and precision-machined using 5-axis CNC equipment. This product is the 4-pin version, providing four mechanical locating points between the upgraded hub and crankshaft when correctly installed. The pinned design creates a positive mechanical connection between the crankshaft and upgraded hub rather than relying solely on the factory friction-based arrangement. Why Upgrade the BMW S55 Crank Hub? The BMW S55 engine uses a factory crank hub and timing-drive arrangement that has become a well-known concern among BMW performance owners and specialists. If the factory crank hub moves relative to the crankshaft, the engine timing can also move from its intended position. This is commonly referred to as a slipped or spun crank hub. Possible symptoms can include: Drivetrain malfunction warnings Engine timing fault codes Reduced-power or limp mode Poor engine running In a more significant event, there is the potential for internal engine damage. Not every S55 engine will experience crank hub slip. However, many owners choose to upgrade the crank hub preventatively, particularly on tuned, high-performance or track-driven vehicles. Not sure whether a crank hub upgrade is right for your car? Read our BMW S55 Crank Hub Guide for a detailed explanation of the factory arrangement, common symptoms, tuned vs standard cars and pinned crank hub upgrades. Kit Contents Insane Performance one-piece CNC-machined crank hub Uprated crankshaft damper bolts Purpose-made drilling bit for the pinning procedure Precision drilling fixture to locate the drill accurately Genuine/OEM BMW crankshaft bolt Professional Installation Recommended Installation of a pinned S55 crank hub requires specialist BMW timing equipment, accurate crankshaft positioning, precision drilling and correct engine reassembly. For customers who do not want the component on its own, Swift Performance offers the complete installation for £1,950 including VAT. Our workshop procedure includes removal of the engine sump during drilling so the area can be properly cleaned and inspected before reassembly. Vehicle Compatibility BMW F87: M2 Competition M2 CS BMW F80: M3 M3 Competition M3 CS BMW F82/F83: M4 M4 Competition M4 CS M4 GTS Engine: BMW S55 3.0 Twin Turbo This product is intended for BMW S55 applications and is not suitable for N55, B58 or S58-engined vehicles. Frequently Asked Questions Is fitting included in the £799 price? No. £799 including VAT is for the standalone Insane Performance crank hub kit. Swift Performance also offers the same 4-pin crank hub supplied and professionally fitted for £1,950 including VAT. How much is professional installation? Our complete BMW S55 crank hub package is £1,950 including VAT, supplied and fitted at Swift Performance in Aylesbury. What is the difference between the £799 part and the £1,950 package? The £799 product is the standalone crank hub kit. The £1,950 package includes the Insane Performance 4-pin crank hub, professional installation, associated replacement gaskets, seals and fixings, engine oil, S55 oil filter and workshop consumables. Which BMW models is this suitable for? S55-powered BMW F87 M2 Competition and M2 CS, F80 M3 variants and F82/F83 M4 variants. Can Swift Performance install it? Yes. Swift Performance offers a complete S55 4-pin crank hub installation service at our workshop in Stoke Mandeville, Aylesbury.