Replaced the bosch Hooter with this. I tried it facing both directions.. stock orientation, and reverse. I like it stock orientation best because it seems to hold boost better. I am running it with the yellow spring and not the green one as recommended. Using this in Combination with cat back and open air intake. Sounds pretty good.. hard to tell because my exhaust (straight pipe) Over powers just about any other sounds lol. BSR PPC is being processed as we speak, so this should help hold the extra boost better. Over all great part, and should outlast my car

Rating: [5 of 5 Stars!]