I think out of all options, the JBD would be the best bang for your buck. For the amount of power it gives it's a no brainer. Plus, why mess with these flash tunes? Aren't you afraid the dealership might find out and void your warranty? Get a piggy back and when you ever need to bring it in for service, just remove it. Done deal. Unless Cobb comes out with a 335d flash for their AP, I'm sticking with JBD for the convenience and price.
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