The very latest EVOLUTION exhaust from POLINI for your YAMAHA BW's 125 4T. This POLINI line of very high quality is uncatalyzed and not homologated on road. This line has a very specific look and is fashionable thanks to its black anodised satin finish. It consists of a stainless steel line, a very light stainless steel muffler with a real carbon end piece, the whole is designed to last in Maintenance-free and rust-free, and offer a very low weight with very high performance! This exhaust is quite expected to release the biggest kits 158cc POLINI as the engines of origins! Ideal with a sport air filter and a sport variator!