BOXER uncorked A direct bolt - on, full 3 straight - through design. The Touring Edition allows the WRX STI to deliver its famous rumble without rasp or in - cabin drone, while introducing intoxicating crackles when shifting, thanks to AWEs proprietary drone - canceling solution, 180 Technology. This configuration compliments the EJ25 is every way. Seriously. Conversion Kits AWE made it easy to convert from a Track Edition to a Touring Edition, or vice versa, if you decide at a later date to turn it up, or turn it down