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      08-18-2011, 06:54 AM   #5
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rvsixdriver's Avatar

Drives: 2011 128i
Join Date: Aug 2011
Location: Mandeville, LA

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This brings up questions

I also have a 2011 6MT sport pack

My exhaust system looks like the lower picture you posted. I saw in an earlier post that the n52 has ULEV and n51 has sulev II on the emissions sticker. Mine says ULEV II. I'm not too sure where the engine serial number is on my car, but I would guess I have the same setup you have.

One question would be is it legal to eliminate one stage of a two stage system? Which one would you eliminate?

How do I tell if I have a three stage intake?

Last edited by rvsixdriver; 08-18-2011 at 11:43 PM.