Subaru OEM 2nd Gear Driven (06 STI) | 32251AA880

Overview

The Genuine Subaru OEM 2nd Gear Driven (Part #32251AA880) is an exact factory-replacement transmission gear designed specifically for the 2006 Subaru Impreza WRX STI. Engineered to Subaru's original manufacturing specifications, this OEM gear ensures precise mesh, proper gear ratio, and long-term durability inside your STI's close-ratio 6-speed manual transmission. Whether you're rebuilding a worn transmission or replacing a damaged 2nd gear, this is the correct factory part — no guesswork, no compromises.

Key Features & Benefits

• Genuine Subaru OEM Quality — Manufactured to exact factory tolerances for a perfect fit and function inside the STI 6-speed gearbox; eliminates the risk of premature wear or improper mesh associated with aftermarket alternatives.
• Exact Gear Ratio Preservation — Maintains the factory 2nd gear ratio of the STI's close-ratio transmission, preserving the intended power delivery and shift feel the STI was engineered to deliver.
• Direct OEM Replacement — Drop-in fitment for the 2006 STI transmission; no machining, modification, or adaptation required.
• High-Strength Steel Construction — Built from the same high-grade steel alloy used in Subaru's original production run, capable of withstanding the high torque output of the EJ257 turbocharged engine.
• Factory Warranty Eligible — As a Genuine Subaru OEM part, this component meets Subaru's parts warranty standards when installed by an authorized service center.
• Verified Part Number — Subaru part number 32251AA880 ensures you receive the exact gear specified for this application — no cross-referencing ambiguity.

What's Included

• 1x Genuine Subaru OEM 2nd Gear Driven — Part #32251AA880

Specifications

Fitment & Compatibility

This gear is designed for the following Subaru vehicle application:

Important: Part number 32251AA880 is specific to the 2006 STI model year. Transmission gear part numbers can vary significantly between model years and trim levels. Always verify your vehicle's transmission code and model year before ordering. If you are unsure of fitment, consult your Subaru dealer or a qualified transmission specialist before purchasing.

Installation

Installation of this 2nd Gear Driven requires full disassembly of the STI 6-speed manual transmission and should be performed by a qualified transmission specialist or experienced Subaru technician. This is not a bolt-on part — proper installation requires specialized tools, knowledge of gear stack assembly, bearing preload settings, and transmission shimming procedures. Professional installation is strongly recommended to ensure correct assembly and to protect your drivetrain investment.