guys im getting my perdana 00" downgraded from altezza.
but the power i knew is not as powerful as altezza. but was planning to transplant FTO 6A12 mivec, into it. how much probably will cost for the engine and labour. 1 more, after transplant FTO6A12, do i need to change GB or just stck to stock?

just n noob question. if were to have better fuel saving. stick to stock 6A12, or transplant 6A12 mivec is better?