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Drivetrain› Differentials and Rear-End Components

MFactory

3.47 Ratio Final Drive Gear Set for Hydro Transmissions

$787.95 $678.95 Save $109.00

SKU: MF-TRS-02B35

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Overview

The MFactory MF-TRS-02B35 is a final drive gear set designed for Honda B16, B17, and B18B (LS) engines with YS1, Y80, S80, Y21, S21, or S4C transmissions. This gear set features a 3.47 ratio and is specifically for hydro transmissions with a 109mm ring gear hole. It replaces the OEM gear set with a direct fit component.
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The MFactory MF-TRS-02B35 is a final drive gear set engineered to enhance the performance of Honda B-series engines, specifically B16, B17, and B18B (LS) models, when paired with YS1, Y80, S80, Y21, S21, or S4C transmissions. This set offers a 3.47 ratio, which is a longer ratio compared to OEM equivalents, providing a noticeable change in acceleration and top-end speed characteristics. This final drive gear set is constructed from high-strength nickel alloy steel, computer-designed, and CNC machined to ensure durability and precise fitment. It is designed as a direct replacement for the OEM ring gear and countershaft, facilitating a straightforward installation for those familiar with drivetrain components. Fitment is specific to B-series hydro transmissions that feature the "small" 10-bolt, 109mm diameter ring gear hole. Vehicles confirmed to fit include the 1992-1993 Integra GSR (YS1), 1992-2001 Integra LS (YS1, Y80, S80), 1994-1997 Del Sol B16 (Y21, S21), and 1999-2000 Civic B16 (S4C). It is important to note that this gear set will not fit models equipped with a factory Limited Slip Differential (LSD).

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.

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Specifications

BrandMFactory
Part NumberMF-TRS-02B35
CategoryDrivetrain
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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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