Thread: N54 Tuning - ar design N55 4" Catless DPs
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      12-23-2010, 01:46 PM   #10
Mike@N54Tuning.com
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Quote:
Originally Posted by e92sport View Post
Can this be installed without any type of tuning software or downpipe fix?

Would it throw any codes?
Can be installed without a tune but requires a DP fix just like on the N54.

Mike
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