i no its kinda of a stupid question and ive done research i jus didnt find the answers ive been looking for what exactly do i need to make my 90 crx si a vtech jus get the head and intake manifold or jus the head off of a d16z6 and bolt it to my car??.......do i need the d16z6ecu or a apexi vtech controller or what??? i would appreciate any feed bak that could help me thanks.