their not that different its manly just easer if u have obd1-z6, obd2-y8.... Its worth doing if u can get one cheap I got my y8 for $40 with everything but I wouldn't spend no $100 on one, no way.... Get an auto man, with auto throttle body, so u don't have to wire for the IACV. Makes it SO!!! much easer....... D-Series.org is ur friend...