IAG Chromoly Transfer Gears For 1.1:1 Transmission | 2006+ Subaru STI 6spd (IAG-DRV-1010)

IAG Performance
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IAG Chromoly Transfer Gear Set

The IAG Chromoly Transfer Gear Set is specifically engineered to strengthen the weak points in the STI 6 speed transmission. When a powerful STI launches aggressively at the track the output shaft progressively twists and weakens. After multiple launches, the output shaft breaks where the driveshaft yoke connects.

IAG’s upgraded transfer gear set is capable of handling these immense loads by improving the gear material and redesigning the parts at the weakest points. The gears are manufactured from chromoly which is known for its improved hardness and strength. The output shaft diameter was increased and the splines were enlarged and lengthened then matched to an upgraded Spicer yoke designed to mate to an aftermarket performance driveshaft.

Please Note: REQUIRES Driveshaft Shop Driveshaft or ACPT Driveshaft


  • Much stronger over OEM
  • Chromoly construction 
  • Increased output shaft diameter
  • Tested on Subaru drag vehicles producing 1200 WHP/800 WTQ at 3000+ LBS


  • 2006-2017 Subaru STI

What's in the box?

  • Chromoly Driven Gear
  • Chromoly Output Shaft
  • Upgraded Spicer Yoke
  • Heavy Duty U-Joint
  • U-Joint Outside Snap Rings



  • Manufacturer Limited Warranty

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