Exhaust is in pretty... weird shape

My muffler finally broke off of the pipe yesterday:

so now I've ended up with a weird 2.5" or 2.75" to 2.25" or 2" straight pipe from the cat back. It's quite carboned up on the inside as seen here:

Should I be worried about the amount of black in that pipe?
Also it is loud. VERY loud. Doesn't sound awful, but it sounds like fuel might be combusting in the tailpipe on shifts?
Last edited by kayweb; May 20, 2013 at 05:45 AM. Reason: neglected to include info

My muffler finally broke off of the pipe yesterday:

so now I've ended up with a weird 2.5" or 2.75" to 2.25" or 2" straight pipe from the cat back. It's quite carboned up on the inside as seen here:

Should I be worried about the amount of black in that pipe?
Also it is loud. VERY loud. Doesn't sound awful, but it sounds like fuel might be combusting in the tailpipe on shifts?
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