I added american customs exhaust, and big city thunder baffles. Also added new progressive 444 heavy duty shocks. but I had to remove the comfort lift and install the OEM lifts in order to install the muffler pipes. I'm happy, its sound good and feels good when riding on uneven roads. Rode about 80 miles, and I felt very comfortable maneuvering the winding roads. It was pricey, but I'm happy with the results. Now a have what I was looking to get, smooth riding, and good sounding pipes.