Quote:
Originally Posted by Kango
Anyone do one of these but with the stock exhaust?
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Yeah. Twice. Did the AA tune and 3IM on my 06 325xi, and again on my 09 328xi. Works fine. The cost/hp ratio is good for the 3IM, and the tune, but I couldn't see dropping $1k for an exhaust which gives a couple HP, but that's definitely personal preference.
I don't remember from the 06, but since I just did the 09, at 82k miles, the original spark plugs were SHOT. I kind of thought the 3IM install didn't give me as much as I recalled from the 06, but figured it needed to adapt. No, it really needed new plugs. Spent the hour to install those and now it pulls like it should. A 100k change interval is total BS, even for the non-turbo.