Quote:
Originally Posted by Josh (PA)
You probably won't. The n54 is the only one with really bad carbon buildup. They made some changes from the n55 on that minimize it. Fwiw people see pretty decent bud up around 50k-75k miles on the n54. We did ours on the wagon somewhere between 80 and 90 and saw a decent improvement
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I have an N54 and feel a huge improvement.
