Exhaust question

Sorry for the long post. Please bare with me...

First post here and I'm looking for some advice with an aftermarket exhaust. Just bought an 08 DC TRD Sport and it came with a magnaflow exhaust on it. Seems louder in the cab than outside the cab. Inside it's almost annoying. It kinda rattles my brain after a while and fatigues my ears. Any how I looked under the truck and saw two black soot spots and felt some air leaking. One spot is right before the muffler and the other is toward the engine where two sections bolt on.

I took it to a local muffler shop that has a great reputation and he said it's all ok. The bolt on location he said was a gasket and that he could replace it but it would just go bad again. He said the leak before the muffler doesn't need to be repaired and that it is all legal. He said he was willing to fix it but he would feel bad taking my money. While I admire that it just doesn't seem right to me.

So my question is, could these leaks be causing the excessive cab noise? Should I get a second opinion?
Thanks!

 

I'd be more worried about the leaks getting in to the cabin while your A/C is on. Fix the leaks.

 

I agree.
So I ended up getting a Dynomax Super Turbo muffler that helped greatly with the cab noise. Got the leaks fixed at the same time.