hey dangerjbl
i dont know about older or newer engines but i know that you have to compare the power from an EG and Teg
brake upgrade may be needed if the power ratio is too big...stock airbox is fine or if you have cai must be stablised
make sure that the rest of the car is legal or you need to fix that too for engineering
i have done these to my EG6 w B18CR a yr ago