Finished installing my new exhaust system (LESS ***** CAT)Thursday, and alls I haft to say is I should have done this months ago, not only does my truck run better and stronger but my fuel mileage has going from 15.9 mpg now up to 18.6. I bought my system from Diesel Pro for what I thought was a great price, for $584.95 which includes shipping I got a complete system turbo back thats made from heavy 304 Stainless Steel, they also give you the better Stainless Steel band clamps along with your choice of ether a 5-1/2" or 6" S/S polished tip, the above price is the same for all cab configurations up to crew cabs with a long bed.

What size is it, 4" or 5"