A bolt on resonator that somewhat resembles a cat (I could maybe have an exhaust shop make me one but i'd rather order it)
go!

 

http://www.siliconeintakes.com/produ...5a099eb9b5c304

 

Why don't you just punch the cat out?

 

Good question.

 

I want a resonator to help keep the noise down.

 

If you want a resonator to help keep the noise down and a "cat" your best option is to punch out the stock cat and have a shop weld in a resonator. Most of the resonated test pipes are way longer than a cat and finding covers for them might be hard.