i will say to your swap, take out the rbc and put back the stock a3 IM and put your stock muffler on. you will see a another big difference like i did! jeff evens told me the rbc is no good for these motors becuse you don't take advantage of it unless you reving about 8,000rpm.
i was going to get a rbc, instead it would be best to get a prc i believe it is called or a TSX IM. im just going to add a power plenum to my a3 im.
id like to see the actual difference with it since you have it on.
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