Physiaclly it will fit. I actually ordered one from tower, but called them (to ask the same question that you are asking now) and thay told me that it is designed for a .18 engine (as the ad states). I don't know if there would be any performance issues or not, but I sent mine back anyway in favor of a Tsais pipe. I'm sure somebody else who knows more than I will chime in on this, but until then.... I hope this helps.