installed it in about an hour. Twice as loud as a Stillen, half as loud as B&B. I have had many compliments on their looks and sound from fellow club members with different brands. The mufflers are big, but they give that "I'm mean and I'm fast" look. Mine are dual 3" tips. By the way, Brullen will make them loud like B&B if you like loud. They are all made to order. When I bought mine, I just called Brullen and asked for the group price given many months earlier, they said OK--$725 + freight. That's with polished mufflers and dual tips. They are all 3" mandrel bent stainless X-pipe with a straight through mufflers.