D&D Exhaust 525Z-31F Black Fat Cat 2 into 1 Exhaust for 1995-2005 Harley Dyna Models
2:1 Fat Cat is a stepped header system at the head is 1 3/4″ to 1 7/8″ to 2″ at collector and 2 1/2″ where the muffler goes to the header.
All full systems are equipped with heat shields, bolt kit, brackets and baffles. All D&D full systems are equipped with heat shields, exhaust gaskets, bolt kit and baffles.
It also comes with both 18mm and 12mm O2 bungs so it can be used with an auto tune module such as the Thundermax Auto Tune.