RE: Is the JP-4 worth the $$$?
I recently got a JP-4 to go with my engines: LRP/Losi 454, Jammin JPX 21, Go GXR 5-port, Mach 427, Dynamite Big Red, etc.. Haven't had a chance to test yet though..
What are some engines the JP-4 is known to go well with?
I want power more than anything else. If it's just a pipe for "smoother power" and "better runtime" then I don't need it..