Our exhaust systems are designed around stock configurations. If your motorcycle has modifications such as Lowered Suspension, Shocks, or Aftermarket Saddlebags, the exhaust system may not work as intended.
2007-2008 Harley-Davidson FLH / FLT
D&D 2 into 1 Fat Cat Exhaust pipe.
2:1 Fat Cat is a stepped header system at the head is 1 5/8" to 1 3/4" to 1 7/8" at collector and 2 1/2" where the muffler goes to the header.
All Fat Cat full systems are equipped with heat shields,bolt kit and baffles.
All D&D full systems are equipped with heat shields,exhaust gaskets, bolt kit and baffles.
Each exhaust system is designed and dyno tested in our facilities.
Our testing is done with the Harley Tuner's.
Every pipe is designed to increase low-end torque and horsepower.
Performance increases are about 8 to 10 percent with the proper tune on the bike.
Louvered baffles are for 80" to Stock 103" motors
Perforated Wrapped baffles are for Stage 4 103" to 113" motors
Using Woods cams for best performance use the Perforated Wrapped Baffle
2007-2008 Fat Cat comes with 18mm O2 bungs for the stock 02 sensors that comes on the bike.
All 2007-2008 Touring models require tuning with our exhaust.
The length of the system with the muffler is too short to use with Extended bag. We offer extended length muffler for bikes that have stretch bags. We will send a special order form to fill out.
There is a upcharge of $250.00 per muffler.
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 are designed for close course racing applications only.