what size resonator would I need for a greddy evo 2?

 

If you are talking about the cat-back, it should come with a resonator shouldn't it? If it is an axleback, your OEM will suffice I would think.

But why did you make a whole new thread on generally the same topic as your other Evo 2 thread? Why not just put this there?

 

it already has a resonator, but can't i get another one to make it quiter?

 

Well, since you are running a race header, there is not many things you can do to quiet it down by much.