ok i already asked what high flow cat to get, now the only question i have is, will a carsound 2.5 high flow cat bolt right up to a stock header and catback exhaust? i plan on getting a dc 4-1 header, but not for another month or so... can i get this for now?

 

up

 

the 2.5" will be too large to mate up with the flanges

 

Unless your cat-back is 2.5" (which I doubt considering you still have a stock header), do not get a 2.5" cat. Get a cat that matches the size of your cat-back. Therefore, assuming you have an aftermarket cat-back system, a 2.25" cat would be optimal.

As for fitment, if you buy a bolt-in specifically for your car, that should work. Otherwise, an exhaust shop could put it together easily.

 

so go with the 2.25 ?

 

Yes, go with the 2.25"