well guys, not realy impressive,tested the psi ported motor with the psi pipes,made 140 hp,then went to stock pipe and can, made 110hp,70 pounds of torque then went tobender can on stock pipe,made 109 go figure, both of thes numbers were aroun 8200 right up to 9200, then we tried the viper pipe with a slp can it made consistan 112 and a bit mopre torque, around 73-74 foot pounds. but it made its power at 8000 to 8500, more playing can be done yet, keep in mind the motor was getting very warm by the time we tried the viper pipe, not sure how to get the claimed 15 hp out of that,maybe changing to a viper y pipe but alot of work to do that, plus the viper y is 1 inch longer and i dont think the piope would fit then