Originally Posted by 2012z

I would add the xpipe and mid pipe combo for sure...the stock set up is very restricting. U will notice a sound increase due to the better flow...but nothing to worry about.. if I recall...you should see 10hp or so with mid pipe and x pipe. I have cat back from them and they claim about 15hp....and over 20 if u use test pipes.... with u having short tails I would guesstimate 20-30 hp at the crank.. don't quote me on that...lol