Heey forget what someone else says I’d say give it a try and go for it yeah a ECM tune is the way for a better performance mod but some of those can and will work it just depends how it made and the software make up inside the tune is strong enough & smart enough to change the factory ecm internal processes from the tuner installed so if your looking for a more price friendly way I’d say go for it ive seen a guy with a upgraded plug in obd2 bully tuner and he had insane power in his g6 I woukd try it out