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Engines and Components› Crankshafts and Components

Turner Motorsport

S55 Keyed Crank Hub Kit

$1,000.00 $995.00 Save $5.00

SKU: CBS55-6001

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Overview

The BMW S55 Keyed Crank Hub Kit from CarBahn Autoworks is designed to address a known issue in the S55 engine where the timing chain sprocket can spin on the crankshaft, leading to camshaft timing deviations. This kit pins the cam sprocket to the crankshaft, preventing slippage, especially when the engine is modified for increased boost or power.

The kit includes the keyed hub, crank bolt, a drill, drill fixture, and drill fixture bolt. The metallurgy is noted as superior to many aftermarket sprockets, and the components are machined and pinned to OEM gears and hubs to prevent the original flawed design from causing issues like rough running or camshaft angle deviation faults.
Show original supplier description
The CarBahn Autoworks BMW S55 Keyed Crank Hub Kit is engineered to resolve a critical weakness in the S55 engine's stock crankshaft design. When modifications lead to increased boost beyond OEM specifications, the timing chain sprocket is prone to spinning on the crankshaft end. This slippage can cause camshafts to go out of time, leading to symptoms such as rough running and camshaft angle deviation faults. This kit directly addresses this vulnerability by pinning the cam sprocket to the crankshaft, ensuring they rotate as a single unit. This is crucial for engines being modified for higher power outputs with larger turbochargers. The kit includes all necessary components for installation: the keyed hub, crank bolt, a drill, drill fixture, and drill fixture bolt. CarBahn Autoworks emphasizes that the metallurgy used is superior to many competing aftermarket sprockets, and the OEM gears and hub are precisely machined and pinned to prevent any possibility of slipping. This keyed crank hub is compatible with a wide range of BMW S55-powered vehicles, including the 2015-2018 BMW M3 Base Sedan, 2015-2020 BMW M4 Base Coupe and Convertible, 2016 BMW M4 GTS Coupe, 2018 BMW M3 Competition and CS Sedans, 2018-2020 BMW M4 CS Coupe, 2019-2020 BMW M4 Competition Coupe and Convertible, 2019-2021 BMW M2 Competition Coupe, and 2020 BMW M2 CS Coupe. *Note: A core charge may apply to this kit. Please contact us for details regarding core charge requirements.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandTurner Motorsport
Part NumberCBS55-6001
CategoryEngines and Components
5,000+ Trusted brands
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