A while back,Fast Larry from the Bandits R US site did a dyno campro with several exhaust systems. The hindle/Brock pulled the best hpand torque readings and was the lightest.FL also has the only all Ti exhaust that they made. I don't remember all the different brands used,I know Holeshot was 1,Yoshi,forget how many.But if you get on his site he'd probably bring them up for you.