---
product_id: 21353879
title: "Synchrotech® Mfactory Honda Acura 4.92 ratio Final Drive Gear set - with case ID S80 Y80 YS1 Y21 S21 S4C (10 bolt 109.8mm ring gear hole)"
brand: "mfactory"
price: "$1945"
currency: NZD
in_stock: false
url: https://www.desertcart.nz/products/21353879-synchrotech-mfactory-honda-acura-4-92-ratio-final-drive-gear
store_origin: NZ
region: New Zealand
---

# Synchrotech® Mfactory Honda Acura 4.92 ratio Final Drive Gear set - with case ID S80 Y80 YS1 Y21 S21 S4C (10 bolt 109.8mm ring gear hole)

**Brand:** mfactory
**Price:** $1945
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** Synchrotech® Mfactory Honda Acura 4.92 ratio Final Drive Gear set - with case ID S80 Y80 YS1 Y21 S21 S4C (10 bolt 109.8mm ring gear hole) by mfactory
- **How much does it cost?** $1945 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/21353879-synchrotech-mfactory-honda-acura-4-92-ratio-final-drive-gear)

## Best For

- mfactory enthusiasts

## Why This Product

- Trusted mfactory brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Included in this set: 4.92-1 Ring gear and Countershaft that are a direct replacement for the OEM Set. This kit has everything you need to upgrade your USDM B16 Hydro to the Hi Performance 4.92-1 ratio. Changing your final drive to a performance ratio will increase RPM and provide better acceleration. Fitting: B series Hydro Transmissions with the "Small" 109MM diameter ring gear hole. Please let us know if you have any questions regarding fitment for your transmission and we will be happy to help you.

## Images

![Synchrotech® Mfactory Honda Acura 4.92 ratio Final Drive Gear set - with case ID S80 Y80 YS1 Y21 S21 S4C (10 bolt 109.8mm ring gear hole) - Image 1](http://ecx.images-amazon.com/images/I/41s-Ongx%2BjL.jpg)

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**Shop now:** [https://www.desertcart.nz/products/21353879-synchrotech-mfactory-honda-acura-4-92-ratio-final-drive-gear](https://www.desertcart.nz/products/21353879-synchrotech-mfactory-honda-acura-4-92-ratio-final-drive-gear)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-07*