AROS GROUP LTD
MMX Crankshaft Hub Fix Upgrade with Bolt Capture Plate for BMW S55 & N55 Engines (M3 M4 M2 F80 F82 F87)
MMX Crankshaft Hub Fix Upgrade with Bolt Capture Plate for BMW S55 & N55 Engines (M3 M4 M2 F80 F82 F87)
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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Protect your BMW straight six from timing slip and spun hub headaches. This single piece crankshaft hub upgrade with a dedicated bolt retaining plate is the proven solution for hard driven and tuned cars. Precision CNC machined from high grade billet steel, it replaces the factory multi piece arrangement to deliver rock solid timing stability under high load, high RPM and repeated heat cycles.
If you drive an S55 or N55 powered BMW and plan to enjoy fast road, track days or higher torque from a remap, this hub and retention plate combo is the must have reliability upgrade. The securing plate positively captures the central fastener, helping prevent backing out under resonance, giving you total confidence when pushing on.
- Stops crankshaft hub rotation that can lead to timing drift and engine damage
- One piece billet construction for maximum strength and long term durability
- Retaining plate locks the head of the bolt for additional safety under vibration
- Ideal for mapped Stage 1, Stage 2 and track focused builds
- Smooth idle, consistent cam timing and peace of mind at high RPM
- Designed for S55 and N55 applications commonly found in modern BMW M and F series models
Why owners choose this upgrade
The standard multi part hub can slip under aggressive use or increased torque. This upgrade replaces that assembly with a robust single piece unit for a positive drive between the crankshaft and timing components. Paired with the capture plate, it is a belt and braces approach to safeguarding your engine against timing misalignment.
Real world results
We have installed this upgrade on customer cars and our own builds with excellent results. Feedback is consistent – stable timing, zero drama on track, and confidence to enjoy the full performance of the car.
Compatibility
Engine codes: S55 and N55. Typical models include BMW M3 F80, M4 F82 F83, M2 Competition F87, plus selected N55 powered cars such as M2 F87, M135i M235i, 335i 435i and other F series 35i variants. If you are unsure about fitment for your specific VIN or model year, contact us and we will confirm before you order.
What you get
- Single piece billet crankshaft hub assembly
- Bolt capture plate for additional security
- Associated fixings where applicable
Professional fitting available
We strongly recommend professional installation. Book your fitting with MJ Modifications in Warwickshire. Request a quote via info@mjmodifications.co.uk.
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