These gears are a great enhancement for any subaru 5-speed. They offer in street friendly 1-4 set that retains the stock 5th for crusing.These gears are significantly stronger than both stock and RA sets. They bode a wider and deeper tooth profile on all gears. Offered only in a synchronized helical version, mFactory's set has an almost stock like drivablility with minimal noise. Gear Ratios 3.27/2.286/1.667/1.238 Application: Subaru WRX