I can't answer your question but I had to comment on the labor rate. My dealer just charged me $100 in labor to install the SPT turbo heat shield, which I thought was a bit steep. But 2 hours to fit a cat-back exhaust? On a new car where none of the fittings or nuts and bolts would be rusty that just seems ridiculous. For an experienced mechanic, I cannot understand how this could take more than 30-40 mins. What a rip off.