I just receieved my white brothes aluminum exhaust race exhaust for my trx. I am very pleased with the system. I got to ride over the weekend and I can say that it was money well spent. They sent me a filter and a 180 main jet that come standard with exhaust. The exhaust was a breeze to put on, it took about 10 mins. I changed the needle clip down one and removed the air box lid. From the first hit of the thortle you could tell a huge improvement over stock. The more I rode, the I like the exhuast. It hits great on the bottom, midrage, and even on top. If anyone is looking for a great pipe just for racing this is a must have. I purchased the pipe through gopartsdirect in the dirtwheels mag.