which ECU??
 

I have been reading a lot of forums about this, to be honest, the more I read the I more I get confused....it seems like there are a few diff group of supporters, ie Kleemann, Renntech etc..
Really looking for some "REAL PROVE" like two cars with diff after-mkt ECU have a knock off....believe many many of other readers are waiting to see it too!! Frankly, 3~5ks are not too much for many C63 owners, but we would love to spend the money on the rite thing, agree?? Btw, have anyone use MHP's product?? any comment?!?