nope, share info here, for malaysia brand car, especially proton, engine capicity max only can go for 1800cc now except perdana and the new inspira, perodua i dunno, japan car can go up to 3000cc, about the brand, legally proton should put mitsu engine, perodua daihatsu or toyota engine, but u can also put in other engine such as proton wira go for honda, it just that when u selling ur car, u cant change the geran name, u nid change back to mitsu or proton engine to change name... my experience, actually, we need to understand our ride bro, here is the facts, KIA is a sub company from hyundai and hyundai get technology to produce cars long time ago from mitsubishi(same like proton but even earlier than proton), therefore, ur kia optima is just like perdana transplant evo 3 engine, it is legal as long as ur mech do the mounting job nicely..... congrates bro..... finally see another evo 4 fans like me around...