VERUS Engineering | Carbon Synchro Kit Transmission | GT86 BRZ I

High-performance synchro upgrade for smoother, faster, and more durable shifting.

Developed by Verus Engineering, this carbon-lined synchro kit is designed for the AZ6 6-speed manual transmission used in the Subaru BRZ, Toyota GT86, and Scion FR-S.

Technical Data & Scope of Delivery

Manufacturer / Part Number: Verus Engineering – A0121A

Compatible with: AZ6 6-speed transmission (model years 2013–2021)

Scope of Delivery (complete set for all gears):

1st gear: Dual-cone synchro

2nd gear: Dual-cone synchro

3rd gear: Dual-cone synchro

4th gear: Synchro

5th gear: Synchro

6th gear: Synchro

Material / Construction: Carbon friction lining with brass synchro body

Benefits & Performance Improvements

Faster, More Precise Shifting

The carbon friction surface accelerates and smooths the synchronization process, improving gear engagement at both low and high RPM.
Result: cleaner, quicker shifts with reduced resistance.

Sharper Shift Feel

More consistent synchronization means noticeably crisper gear changes – whether in daily driving or aggressive track conditions.
Less notchiness, more confidence.

Increased Transmission Longevity

High-quality materials and improved wear characteristics reduce tooth and friction wear over time.
More even load distribution protects gear engagement surfaces and lowers long-term maintenance stress.

Improved Lubrication Behavior

The carbon friction interface promotes optimized oil film behavior during engagement, supporting durability and heat management inside the gearbox.

Target Audience / Intended Use

Ideal for drivers of BRZ / GT86 / FR-S (6MT) who want:

Maximum shift precision
Improved performance driving characteristics
A more durable long-term gearbox solution

Highly recommended for:

Track day vehicles
Sport-driven street cars
Modified engines with increased torque output

Conclusion

The Verus Engineering Carbon Synchro Kit is a technically refined, premium upgrade for anyone looking to elevate the AZ6 transmission.

Carbon + brass construction, noticeably improved shift performance, and increased durability – a clean, long-term solution for drivers who demand more from their gearbox.

Disassembly guide available here.
Verus installation instructions for the kit available here.