N54 Tuning - ar design N55 4" Catless DPs
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12-23-2010, 03:46 PM
BimmerPost Supporting Vendor
Drives: 2007 335i, 2015 M3
Join Date: Dec 2008
Originally Posted by
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.
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