How does it sound to have the highest quality exhaust system on the market? With over two years of development and testing, our new BBR D-Section Exhaust System takes performance to the next level. This new exhaust system is handmade in-house at BBR using only the best materials available. These pipes feature a billet end cap carved from solid aluminum block, thin-wall stainless header and heat shield, and our exclusive D-Section design for increased tire clearance and packing volume. The BBR D-Section has already won every major mini-bike race that matters. Nothing else comes close! # Thin-wall stainless steel header and mid-pipe # Lightweight 6061 aluminum muffler # Billet BBR endcap # Stainless steel heat shield # USDA Forrest Service approved spark arrester # BBR quiet core insert included # All stainless steel hardware