Originally Posted by Flaguy

Yea...it went down cause it sounds so f*cking good during open throttle lol. All jokes aside though...i haven't noticed a change but would not be surprised one bit if it improves gas mileage a few MPG under normal driving.

But truth is i just haven't monitored it.

Fact is...this WILL improve performance. It WILL sound better. It WILL look better under the hood. It will PROBABLY get better gas mileage. And it WILL be worth the money. But if you are expecting it to get prius level of gas mileage and suddenly have ferrari performance...no. This differences will be negligable. The sound alone makes this mod worth it to ME.