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Junior Member
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Discussion Starter #1
I have 04 C 15 MBN. MBN 28984 475HP Had couple months and from day it pulled very hard has 40 lb boost. Not good fuel mileage but what I do that's normal. I thought someone might have put 6nz tune in it but we put a code reader on it today and it gave the same serial number thats on the engine but said C 16 596 HP. which brings me to my question, Can they do that and keep my serial number
 
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