46U

I am running the O.S. T1040 R70 tuned pipe. It is the one where the stinger has a 7mm Inside Diameter. I got the larger stinger daimeter because i figured that it would help this engine breath better.
[link]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXHGK8&P=0[/link]


Here is the motor saver air filter that i am running. It is as big at the cooling head on the engine.
[link]http://www2.towerhobbies.com/cgi-bin/WTI0001P?&I=LXDBD5[/link]


I still had to stretch it over the carb.