STI RA Gear Set for the 5-Speed WRX

Assembled by RalliSpec, the close ratio gears from the STi RA feature strengthened and hardened components for improved reliability of the 5MT in modified Imprezas. The gearsets have REM-treated 1st-4th gears for even further improvements in reliability at high power levels. Each gearset includes all necessary gears for installation including a custom speedometer gear (3.9 final drive ratio only).

SKU
STI RA Gear Set for the 5-Speed WRX
Grouped product items
Product Name Qty
STI RA Close Ratio Gear Set + 02 WRX Install Kit
Now Only $1,827.00 Regular Price $2,188.50
STI RA Close Ratio Gear Set + 03 WRX RA Gear Set
Now Only $1,784.00 Regular Price $2,145.49
STI RA Close Ratio Gear Set + 04 WRX Install Kit
Now Only $1,674.00 Regular Price $2,037.49
STI RA Close Ratio Gear Set + 05-07 WRX Install Kit
Now Only $1,703.00 Regular Price $2,037.49
STI RA Close Ratio Gear Set + 08-14 WRX Install Kit
Now Only $1,937.00 Regular Price $2,037.49

Assembled by RalliSpec, the close ratio gears from the STi RA feature strengthened and hardened components for improved reliability of the 5MT in modified Imprezas. The gearsets have REM-treated 1st-4th gears for even further improvements in reliability at high power levels. Each gearset includes all necessary gears for installation including a custom speedometer gear (3.9 final drive ratio only).

Now REM Treated for increased strength and reduced operating temperature. 

Professional installation is very strongly recommended

Please call us to find out which kit you need if you are installing these into a Forester XT or Legacy GT

Comparison of 5-Speed Ratios:

JDM STI
1st-3.166
2nd-1.882
3rd-1.296
4th-0.972
5th-0.738

JDM STI-RA
1st - 3.083
2nd - 2.062
3rd - 1.545
4th - 1.151
5th - 0.825

USDM WRX
1st - 3.454
2nd - 1.947
3rd - 1.366
4th - 0.972
5th - 0.738

This kit contains the following:


STI RA Main Shaft
STI RA 1st Driven Gear
STI RA 2nd Driven Gear
STI RA 3rd Drive Gear
STI RA 4th Drive Gear
STI RA 3rd/4th Driven Gear Cluster
STI RA 5th Drive Gear
STI RA 5th Driven Gear
1st Gear Synchro (baulk ring)
Lock Nut, Main Shaft
Lock Nut, Pinion Shaft
Lock Nut, Driven Shaft
Oil Seal, Main Shaft
Custom Steel Speedometer Gear
(Calibrated for 3.9 Final Drive)
Case Gasket


You must select the correct Installation kit for the year of your car. If you are not sure what year your transmission is, you need the 02 WRX Install kit.



warning_symbolWARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to https://www.P65Warnings.ca.gov/passenger-vehicle.

More Information
SKU STI RA Gear Set for the 5-Speed WRX
Product Type Drivetrain
Drivetrain Gear Sets, Transmissions, Differentials
Brand Subaru JDM
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