12-17 HARLEY FXDB3: Supertrapp 2:1 Supermegs Exhaust (Black Ceramic) SuperTrapp 2:1 SuperMegs are the notorious exhaust upgrade with proven out-of-the-box 15% bolt-on horsepower gains across the board and a respectable sound.Increase horsepower while getting a glorious throaty exhaust note.The 2.5" collector allows maximum controls.The SuperTrapp Imposter pipe is available (and sold separately) to return 2-into-1 equipped Baggers back to their balanced, stock, True Dual look.Made in the U.S.A.