Few mass produced exhaust systems that I like. First because they are mass produced. Second because they never look as good as I want when installed on my built from the ground up bikes.There are a few exceptions, like these 2 into 1 Big Radius from Vance & Hines. If you don’t mind seeing them on a lot of bikes (trust me, they are going to be popular), they are the ones to use on a stock Harley and all customs with a Bobber flair. where budget is an issue (yes, it takes a lot of time, skills to weld & money to build a one-off exhaust system). Making less noise than straight pipes, but loud enough to make yourself announced as a "Harley" rider, their beefy look is a good match to any Bobber look alike. Vance & Hines has always built high quality exhaust systems and is a pionner in blue-proof technology. So, for the boulevard I can recommend these ones. . .