Engines and Components› Crankshafts and Components

RK Tunes

S55 Billet Pinned Crank Hub

$999.00

SKU: RK.S55.CRANKHUB

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The RK Autowerks S55 Crank Hub is a billet pinned crank hub designed to prevent the hub from spinning, even on heavily modified S55 engines. It is laser scanned for perfect fitment and serves as a direct replacement for the stock component. This hub is machined in-house from heat-treated 4130 Chromoly.
Show original supplier description
The RK Autowerks S55 Crank Hub is engineered to provide a secure and reliable connection for S55 engines, preventing the crankshaft hub from spinning, even under extreme modification. Featuring a 4-pin design, this billet hub is laser scanned for precise fitment, ensuring it acts as a direct replacement for the OEM component. Machined in-house using CNC mills from heat-treated 4130 Chromoly, the RK S55 Crank Hub is built for durability and performance. This robust construction ensures it can withstand the demands of high-output S55 engines. This crank hub is compatible with all S55 M models, including the 2014-2018 BMW F80 M3, the 2014+ BMW F82 M4, and the 2019+ BMW F87 M2 Competition & M2 CS.

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.

Fitment

Fitment Guaranteed

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Specifications

BrandRK Tunes
Part NumberRK.S55.CRANKHUB
CategoryEngines and Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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