IAG Chromoly Transfer Gears For 1.1:1 Transmission Subaru STI 06-21 | IAG-DRV-1010

Product Fitment: 

2006-2021 Subaru STI

The IAG Chromoly Transfer Gear Set is the ultimate upgrade for high-powered Subaru STI builds. Designed to eliminate one of the most common STI 6-speed weak points—the output shaft—it’s engineered to endure brutal launches and deliver long-lasting drivetrain performance. Ideal for track, drag, and high-torque applications.

Features:

• Chromoly Gear Construction
  Made from ultra-durable chromoly steel to improve gear strength, hardness, and resistance to twisting under high load.

• Reinforced Output Shaft Design
  Features increased shaft diameter and lengthened, enlarged splines for maximum strength at the yoke connection.

• Track-Proven Reliability
  Tested on 1200 WHP / 800 WTQ Subaru drag builds weighing over 3000 lbs.

• Optimized for Aftermarket Driveshafts
  Designed to work with performance driveshafts like those from Driveshaft Shop or ACPT (required for installation).

• Heavy-Duty U-Joint & Yoke Assembly
  Includes upgraded yoke and serviceable U-joint with snap rings for long-term reliability.

Gear Set Includes:

• Chromoly Driven Gear

• Chromoly Output Shaft

• Upgraded Yoke

• Heavy-Duty U-Joint

• U-Joint Outside Snap Rings

Fitment Notes:

• Gear Ratio: 1.1:1

• Note: Requires compatible aftermarket driveshaft (Driveshaft Shop or ACPT recommended)

• Important: Gear whine is normal due to dog-style engagement; not indicative of a defect.

Replacement Parts:

• U-joint and yoke are wear items—check regularly for competition vehicles. Replacement Kit available (PN# IAG-RPL-1000)