Thats what I have in one of my maxxs, alittle tip I turned my carb around and its crooked, looks funny but I have perfect access to all my adjustment skrews and my throttle linkage isnt fighting with my spur anymore. I have only tried the pipe I got from olds on it, The engine runs excellent. Plenty of torque and good top speed.
On mine i got a stinger(that is what we call them @ my LHS) (i 4got the real name). Its the pipe that has a U shaped header and make the exhaust come out the back of the body.
I have a pipe and header (nip)that will work great for that mill. Its the AE tuned pipe, and duratrax header. Its a great combo! Its what I run on my Maxx. The header is a nice big bore header and the pipe is great for low end. The header is nip and the pipe has a total of about two hours on it and looks brand new. PM me if you are interested and I will give you a good deal on both of them. Even if you get them someplace else it is a great combo that I highly recommend.