cat. converter questions

[1fstramand1slovibe]

when i had my custom exhuast done i had the secondary cat and the resonators cut off. now since the second cat is behind the second O2 sensor this hasnt caused any problems but im wanting to put a aftermarket high flow cat and header on it. my question is does anyone make a single cat unit or does all of them come with both cats and the connecting pipes, ect.. i dont want to have to order it then have it taken to an exhuast shot just to get the second cat cut off agian... any help would be appreciated

[Raven]

Magnaflow makes single hi-flow cats, you just need to know what size.