I'm looking for some good pics and specs of the stock dual cat setup on our cars. I'm thinking about getting a Y pipe custom made for my car so I have a dual cat setup, and can dump the single cat(which i think is worn out neway). I'm pretty sure it's 2 1/4 inch right? I could have 2 1/4 inch off the headers, into 2 cats, then they merge into 3 inch into whatever catback I may have, right? Thanks.

 

I have been looking for the same thing.

Flowmaster makes a nice after cat Y-pipe, but the WILL NOT sell it separately from their kit. The only way is to buy their 2 1/4 into 3 inch collector and have the pipes made to go to the converters.

That is what I will be plan on doing when I get my headers installed.

 

Email me. The pic is too big to post on here.