MX-5 / Miata NC / RX-8 MT6 6-Speed Gearbox Strengthening Bundle – Billet Bearing Plate + Bushes

£274.97 £229.99 Save £44.98
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  • Fixes 3 common MT6 failures
  • Billet plate 4× stronger than OEM
  • Brass bushes replace plastic
  • Bundle price
  • In stock, ready to ship
  • Secure checkout

MT6 Gearbox Upgrade Builder

Build your NC MX-5 / RX-8 MT6 gearbox upgrade package. The bearing plate upgrade bundle includes the billet bearing plate, the brass gear change control and reverse gear bush upgrade; supporting tools and replacement shaft nuts can be added as required.

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Mazda MX-5 Miata NC / RX-8 - 6 Speed Manual Transmission MT6 Strengthening Upgrade Bundle
Mazda MX-5 Miata NC / RX-8 - 6 Speed Manual Transmission MT6 Strengthening Upgrade Bundle – view 2
Mazda MX-5 Miata NC / RX-8 - 6 Speed Manual Transmission MT6 Strengthening Upgrade Bundle
Mazda MX-5 Miata NC / RX-8 - 6 Speed Manual Transmission MT6 Strengthening Upgrade Bundle – view 2

Overview

Strengthening bundle for the Mazda MX-5 / Miata NC (2005–2015) and RX-8 MT6 6-speed manual gearbox, covering its three most common failure points at a bundle price: the bearing plate, the change control bushes and the reverse gear bush.

The EN24 steel billet bearing plate is roughly four times stronger than the factory cast aluminium part, keeping the shafts aligned and reducing gear wear under hard use. The brass bushes replace the original plastic parts for more precise, reliable shifts. All three are fitted during a single gearbox strip-down – the most cost-effective way to future-proof your MT6 before it fails.

Specifications

FitsMazda MX-5 / Miata NC 6-speed manual (MT6), 2005–2015
Mazda RX-8 6-speed manual (MT6)
PartGearbox
MaterialEN24 Billet Steel
ManufacturingCNC Machined
FinishRaw
Pack sizeBundle: bearing plate + 3 change bushes + reverse bush
ReplacesFactory cast bearing plate and plastic shift bushes
  • Precision CNC machined from EN24 steel – about 4× stronger than the cast OEM part
  • Stops the main and counter shafts moving out of alignment under load
  • Helps prevent accelerated gear wear, plate cracking and gearbox failure
  • No machining or permanent modification required
  • Suits fast-road, track and high-torque applications
  • Brass change control bushes (set of 3) replace the factory plastic P601-17-481 bushes
  • Brass reverse gear bush replaces the plastic reverse change bush
  • Machined to tighter tolerances than OEM for more precise, consistent shifts

Installation requires partial gearbox disassembly. Follow Mazda's MT6 overhaul procedure to ensure correct bearing preload and assembly – professional installation is recommended.

Always use a high-quality GL-4 transmission fluid in this gearbox – do not use GL-5.

Read the bush install guide

We do our best to process and ship orders within 1-2 business days (Monday-Friday, excluding holidays). Delivery time depends on location. Below are examples:

UK: 24hrs

Europe: 3-5 days

America and Canada: 5-7 days

Australia: 5-7 days

If you have any questions about your order, you can reach out to our Customer Service team and we will be happy to help.


We Guarantee Everything We Make

If you are not satisfied with one of our products at the time you receive it, or if one of our products does not perform to your satisfaction, please get in touch and we'll make it right. We've been trading for over 2 years and not once had return due to fault or poor quality.

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