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2009-2016 Harley Touring Boss Fat Cat 2:1 Full Exhaust System

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Product Code: 556Z
Availability: In Stock

Available Options

How to install or Remove a Baffle
556Z ins
556Z and 549N Info Sheet

Year: 2009-2016
Make: Harley Davidson
2009-2016 Harley-Davidson FLH / FLT
Bagger Motorcycles
D&D 2 into 1 Boss Fat Cat Exhaust pipe.


  • 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"

  • When using Woods Cams the best baffle to use is either of the Perforated Baffles.
  • The Boss Fat Cat's starting in May 2014 comes with both 12mm and 18mm 02 bungs to fit bikes 2009-2015. The new part # has a Z in it for both size 02 bungs.
  • Slant Cut Muffler work best on the CVO extended bag models.
  • At idle,the motorbike is deep,boomy and full of character. Not only does the pipe look good, it is a wonderfully sounding experience for the rider.
  • Blueing and Discoloration are caused by Improper Tuning and will not be covered under Warranty.
  • D&D Performance Exhaust Systems as designed for close course racing applications only. Not for use on pollution controlled vehicles.

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