After seeing what these cars are making with just a tune, I've definitely decided to go ahead and purchase the SCT x4 tuner. Ive never been one to trust a mail order tune, saying one tune is optimal for every car. So, I'll have this thing on the dyno and we'll mess around with it at my local tuner. I'll post before and after numbers for you those that are interested. My appointment is on Monday and I'll have the results posted that day. Very excited