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IAG Performance Transmission Gear Set IAG Spec PPG 1st - 4th Straight-Cut Synchro Gear Set

Manual Transmission Gear Set


IAG Spec PPG 1st - 4th Straight-Cut Synchro Gear Set for 04-21 6-Speed STI

  • Increased strength to prevent breakage on high horsepower applications
Pricing: $5,999.99

Free ground shipping on all order over $100.00 (some exclusions may apply)


Subaru: WRX STI 13 - 21 Sport-tech / Tsurugi Edition / Launch Edition / Sport / Base / Limited / Series.HyperBlue / Kanrai Edition / STI / Type RA / S209, Subaru: WRX 12 - 16 STI, Subaru: Impreza 04 - 14 WRX STI Limited / WRX STI Special Edition / WRX STI

Gear Set Includes: (x1) Input Shaft, (x1) 1st Straight-Cut Output Gear, (x1) 2nd Straight-Cut Output Gear, (x1) 3/4 Straight-Cut Cluster Gear, (x1) 3rd Straight-Cut Input Gear, (x1) 4th Straight-Cut Input Gear, (x1) Clutch Input Shaft, (x1) Reverse Idler Gear, (x1) Input Shaft C Clip, (x1) Retainer Key. Gear Sets are specific to transmission applications - please choose accordingly. The IAG-Spec PPG gear set suits factory 2004-2021 STI transmission cases and requires professional installation. Additional components required for installation include synchronizers, bearings and more. Transmission should be professionally torn-down for inspection and evaluated before determining additional components needed for proper installation. Due to the straight cut gear teeth an audible whine while in gear is to be expected and is normal. PPG Recommends Motul Gear300 75w90 Gear Oil which should be changed at 3000 mile intervals.

Gone are the days of blowing up stock six speeds, or having to resort to race-only solutions to support the high power levels that built Subarus now produce. The IAG-Spec PPG Straight-Cut 1-4 Synchro Gear Set is designed for weekend racers (and weekday racers for that matter) who prefer the streetability of a synchronized gearbox which is suitable for daily driving. The kit features strong, straight-cut gears (vs. traditional helical gears) which provide maximum performance and durability for high horsepower Subarus and can be safely driven on the street.


  • IAG-DRV-1030
  • IAG-DRV-1030
  • 887753807588
  • IAG Performance
  • New


Shipping Information

  • Item Requires Shipping
  • 23.5 lbs.
  • W11.5000” x H8.5000” x L16.0000”
  • Free ground shipping on all order over $100.00 (some exclusions may apply)

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