sorry but i disagree about not gaining when OBD2's are chipped . its proven on the rollers , they work on both obd1 and obd2 ,its just , as you said there is more gain when doing obd1 . as for the cheap ebay chips . same as any chip at the end of the day just you have to fit it yourself . soldering inside the ECU if im not mistaken just my 2p . liam