566Z-31 D&D 2-into-1 Boarzilla Black for 2009-2016 Harley FLH/FLT Touring Models
2:1 Boarzilla exhaust system 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 Boarzilla full systems are equipped with heat shields, flanges and exhaust gaskets, bolt kit and baffles. E This system has both 18mm and 12mm 02 ports so that it can be used with a Thundermax Auto Tune or a Dynojet Auto Tune if desired.
Every pipe is designed to increase low-end torque and horsepower. Performance increases are about 15 percent with the proper tune on the bike. Each exhaust system is designed and dyno tested at their facilities.
The Boarzilla 2:1 exhaust is for bikes that have 113″ to 131″ motors.
This is a great sounding exhaust system. Matching dummy pipes are available for those with wrapped bags or who like the true dual look.