i like the sirio engines for 2 reasons they are fast and cheap
they are availble in a legal 3 port and outlaw 5 port turbo
i have a modded sirio 3 port and it is extremely fast
i have noticed even the out the box engines are very fast
soon i will be getting the outlaw 5 port
but i will be getting a regular plug button for it though i dont want to spend 7 or 8$ for a glowplug