Banks Power 03-04 Dodge 5.9L CCLB Monster Exhaust Sys - SS Single Exhaust w/ Black Tip4 inch constant diameter pipes with Straight thru muffler cuts back pressure up to 81 Percent. Turbo Back System. 5 inch Cerakote Black tip. The 4 inch Monster exhaust system flows up to 122 percent better than stock and virtually eliminates backpressure. Banks streamlined 4 inch turbine outlet pipe with provision to retain stock catalytic converter, intermediate pipe(s) and tailpipe are formed of stainless, heavy wall tubing with constant diameter