The absolute highest quality performance pit bike/play bike exhaust system on the market - the next generation in D-Section exhaust systems, the D3. This design incorporates an aircraft quality stainless steel header and mid-pipe that have been tuned specifically for each model to optimize performance and power gains. A lightweight “D” profile muffler is used to dramatically reduce weight on all models. BBR’s unique “D” muffler also allows for maximum tire clearance and packing volume. If your neighbors aren't fans of your pitbike's new voice, BBR offers a Cancel Core dB reducing insert to keep the HOA out of your hair.