Mosselman BMW S55 Engine Crank Hub Upgrade For BMW F80 M3, F82 M4 & F87 M2 Competition

Increase the reliability of your BMW's S55 engine with the Mosselman S55 upgraded crank hub. As featured in our BMW S55 engine reliability review, the crank hub is a common failure point with tuned cars being the most at risk. In the BMW S55 engine, camshafts are connected to the crankshaft via a camshaft chain. This chain, in turn, is connected to a sprocket that’s mounted on the crank hub. In stock form, this sprocket is not fixed on the crank hub, putting tuned engines at considerable risk of failure. If the sprocket shifts out of alignment due to increased power, so does the engine’s timing.

The Mosselman S55 Crank Hub offers a vast improvement in terms of engine safety. We recommend the crank hub modification for heavily tuned engines that put increased levels of strain on the crank hub and sprocket.

Important Note: The Crank Hub upgrade should only be installed by a qualified shop or technician (timing tools are required). Improper installation can cause damage to the engine.

Key Features:

• Better-than-stock
  The modification offers a vast improvement in terms of engine safety.
  
• Recommended for Stage 3 tuning
  The crank hub is recommended for heavily tuned engines that put
  increased levels of strain on the crank hub and sprocket. 
• Precision engineering
  Designed and built with the highest precision.

Compatible Vehicles

• BMW F80 M3 Saloon (2014-2019)
• BMW F82 M4 Coupe (2014-2020)
• BMW F83 M4 Cabriolet (2014-2020)
• BMW F87 M2 Competition Coupe (2018-2021)

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.