So i bought the car with a WORKS tune on it, the person that sold it to me told me that it was just a moderate street tune, nothing too crazy. So i told him to keep the tune and not tune it back to stock. So my question is if i go and buy a drop in filter or a downpipe would i have to retune it? currently it only has a catback.

 

you probly would be fine with just a drop in but i would deff get a tune will make such a big improvment over stock tune well worth the cash

 

He already has a tune.

No, you don't have to, especially with the drop-in, but you would prolly notice a difference with/without a tune as far as the downpipe goes. And you don't know exactly how the tune is so the the DP may make the boost peak higher.. so it's hard to say..

 

IMO I would just get a tune for a piece of mind. Can't always trust previous owners.

 

thanks so much guys, i was always confused about this. tuning can cost a lot, and i trust the guy that did the tune on the car

 

drop ins not a big deal but with a downpipe to get more for the money get a retune