Description
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:
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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:
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Chromoly Driven Gear
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Chromoly Output Shaft
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Upgraded Yoke
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Heavy-Duty U-Joint
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U-Joint Outside Snap Rings
Fitment Notes:
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Gear Ratio: 1.1:1
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Note: Requires compatible aftermarket driveshaft (Driveshaft Shop or ACPT recommended)
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Important: Gear whine is normal due to dog-style engagement; not indicative of a defect.
Replacement Parts:
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U-joint and yoke are wear items—check regularly for competition vehicles. Replacement Kit available (PN# IAG-RPL-1000)
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