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2008 N54 with about 58k miles (tune, intercooler and downpipes)
Ever since I bought the car with CPO coverage, I have always heard a rattle upon start up so I figured this is normal to me. It did become more apparent when I put in a set of catless downpipes, but it only happens on start up for like a second and goes away and it never happens again. It only does it on cold start ups, so it honestly doesn't bother me if this is wastegate rattle.
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