engine is a .15 or 2.5cc. No the wheel base is too short for side pipe. It would have to be around 3.5 inches to fit and i have not found any thing bu the CRT.5 pipe which is 4". I may try to pick one up for the right price and use the flex header i bought but for now if i can mod stock to work better, it would be a cheap great upgrade to share with other Mg16 owners who are looking also.