• 2:1 Boss Fat Cat is a stepped header system at the head 1 5/8″ to 1 3/4″ to 1 7/8″ at collector and and 2 1/2″ where the muffler goes to the header.
  • All Boss Fat Cat full systems a equipped with heat shields, exhaust gaskets, bolt kit and a baffle.
  • Each exhaust system is designed and dyno tested at our facilities. All of our testing is done with that Harley SE Race Tuner.
  • Every exhaust is designed to increase low-end torque and horsepower.
  • Performance increases are about up to 15% with the proper tune on the bike.
  • The Louvered wrapped baffle is the quitest baffle for motors 96″ to 103″
  • The Perforated baffle is the very very loud baffle for motors 96″ to 113″


All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only.
Not designed or legal for use on a public highway.

Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.

Weight 39 lbs
Dimensions 47 × 27 × 7 in