The S&S R&D team took their proven 2:1 SuperStreet exhaust internals and finally ported them over to the Sportster platform. None of the shorty system fluff that kills power; they are here for the gains and this pipe is designed to make power.

How about a 11% bump in Hp? Highly engineered bends wrap around factory controls (works with mids or forwards), exiting through a stepped header and 4-in. muffler. The entire system is coated in their latest super durable black and topped off with an aluminum race-style cap.
How does it sound? We knew you’d ask. The high volume muffler produces a rowdy tone that unleashes the true v-twin sound the Sportster was designed for.
Link: S&S Cycle