The CST 10 is the first Quattrini 210 TV expansion chamber exhaust to come to market. The CST 10 is similar to the CST 3 and 4 pipes in it been a low end torque pipe but still producing good BHP. This produces maximum BHP and torque around 6000 RPM but with a power and torque band running from around 4000 to 7500 RPM. Not only that but they are Hand Made here in Britain! Looking for the only expansion exhaust on the market and coming from a developer that produces some of the best exhausts on the market then this is pipe for you!