RE: I need help choosing a pipe.
That 053 pipe is supposedly a great match for the Mach 427 and LRP Spec 3. I recently picked one up for my Mach, but haven't tested yet cuz of the weather.
I've never heard of anybody using one with an Axial.
I would also suggest maybe trying to find the stock pipe and header from a Robitronic Mantis, as the Mantis comes stock with the Axial, and they move pretty well stock I've seen.
I guess the Protos buggy has the same pipe/header too..
Another idea, and a cheap one - might be the stock pipe from the Hyper ST Pro. It's kind of an all-rounder for 28's. I bet you could get one for under 40 bucks on ebay, cuz people just sell them out of their kits..