Finally, the exhaust is done.

I had 2 1/2 inch on my 408 with no X or H pipe. It rapped on decell and was generally embarrassing me by sounding like a Chevy. I had 3" collectors on my TTi's and was running Flowmaster 10 series. it was very loud. I went to a local exhaust shop and he installed rolled true 3" all the way back to dual Flowmaster 40 series and put in an H pipe. No more rapping, still loud but not obnoxious, and I felt no loss of low end torque. The whole job including mufflers was $375 and he did great work. I am very happy.