Pro Circuit has built a reputation around their exhaust systems. It's at the core of thier business. Pro Circuit has a wide variety of exhausts for all the popular ATVs. There are pipes and silencers for racing, recreation, "quiet riding"...even USFS-approved Spark Arrestors. Styled after Pro Circuits championship systems these exhausts offer the same great performance without the expense of Titanium. Pro Circuit also offers the slip on style exhaust. The T-4 Slip-on has an impressive design, polished aluminum canister, stainless steel mid pipe and ultra responsive performance. Setting an affordable standard of riding excitement, the T-4 Slip-On is developed to increase the horesepower and torque throughout the power curve.