[nordschleife]

Originally Posted by forrestgum

We have F20 116i owners who had already installed the Kelleners Sports piggy back. Check out their reviews here

http://www.bmw-sg.com/forums/1-serie...s-sport-7.html

Thanks forrestgumm, already read that one by zeromax, I have checked the price of KS piggyback, costs almost double of other brands. I wonder if they are all the same, at least on the peak output.

Anyone on other brand?