loud noise on 2007 Cadillac CTS

car sounds like a race car without a muffler. is it the muffler or do i have some kind of compression problem.

by in Mesquite, TX on March 07, 2011
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1 answer
ANSWER by , March 07, 2011
If seems to run ok and no check engine light then I assume you have exhaust problems or oxygen sensor came out.