If im not mistaken the Picco P3 .28 and the Jammin.28 are the same mill. If they arent they are damn close. I saw an AB mods P3 in action and it was incredible. But in a buggy I would NEVER put a .28 or for that matter no engine larger than a .21. I would get a GO tech .21 5 or 7 port modded, it should cost you about $275 no more and you will have a car that wont be passed by anything. Thats what I am getting for my new buggy this fall.