Well, from what I have read on here (do a wee search and you will see), nowt much to be gained. Better noise per chance.
So noise and nice looking tail pipes or cracking wheels for that amount of candy.
sure someone else will confirm tho, and as I say... seen it on here many a time about no power gain, or very little. I wish I had done my suspension and remap before the Miltek I got. I done it the wrong way!
Let us know what you go for though!