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I Did Not Know???
I drive a 2007 3.0si z4 and i went to get my resonator taken off at my local muffler shop and when i went in the guy told me i dont have a resonator, i have 4 cats???? I was shocked i thought it had one. so i went to another muffler shop and he said the same thing.. HOW COME THEY DONT HAVE RESONATORS??
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