if u run meth do u have to get a tune if so why is that

 

yes, if not you will just run extremely rich and not get any benefits from it. the purpose of meth/water injection is more boost, more timing and an all around more aggressive tune. without tuning, it is pretty much useless

 

k cool any mod suggestion

 

Yes. The search button. It's the #1 mod you will find on this forum.