FLO~PRO 5" Turbo Back Exhaust System With 4" Downpipe 1994-2002 5.9L Dodge Cummins FLO~PRO's turbo back exhaust is the ultimate in diesel truck performance exhaust. All systems are mandrel bent tubing, available in stainless steel and aluminized, include all required hardware for installation, and last but not least, have the option of including one of FLO~PRO's performance mufflers or a muffler eliminator pipe. With great sound and performance, look no further than FLO~PRO.