hi guys need to change my muffler on my tornado bb and i like to buy on in my LHS but i dont no with on to buy? Whats the best one. and how would it make a diff.. i want to take off faster.

You want a torque pipe. Short and fat. Like the Traxxas pipes. Here read this review Harryball did for us on the difference between torque and RPM pipes.

[link=http://allaboutfunhobbies.com/pipevspipereview.htm]http://allaboutfunhobbies.com/pipevspipereview.htm[/link]

But for more take off you would want a torque pipe.