What else is done to it. What type of riding do you do. I ride alot With guys who have toomey t-6's ,CPI's, I have pro-circuit and rocket pipes, For wide open riding I like the rockets or CPI's. If you do an even amount of both I'd say toomey. If mostly trail and sand pit type stuff go with the PC's. The only reason I like the PC's better than rockets for trail and sand is the size of the rockets, they can be too big in certain situations. and the PC's have an even predictable type of power where the toomey's seem to hit the power band hard and fall out of it easily while riding in a sand pit. Just my experience im sure other people have diff opinions.