Gutting cats.... Question

[Canuck Stang]

I've looked at all the threads I could find regarding gutting the stock cats, so here's my question.

If I only gut the first two cats (closest to engine), on my Mach will I get a check engine light? I saw one thread that said I wouldn't, but that was about a GT I believe.

So.. does anyone know?

How does this sound by the way? I have Flow 40's welded in right now..

Thanks in advance.

 

[trinity_gt]

I've looked at all the threads I could find regarding gutting the stock cats, so here's my question.

If I only gut the first two cats (closest to engine), on my Mach will I get a check engine light? I saw one thread that said I wouldn't, but that was about a GT I believe.

So.. does anyone know?

You shouldn't. GT...Mach, won't really matter either way to the PCM. Those cats are called "warm up" cats and they're intended to act as something of a "trap" for cold-start unburnt hydrocarbons. I've got an MRT catted H-pipe on my GT that dispenses with the warm-up cats and I've not yet see an SES light after numerous tankfuls.

FWIW, I personally would purchase a catted H- or X-pipe and keep the factory pipe intact in case it needs to be re-installed for some reason. Aftermarket pipes aren't that expensive and you get the added benefit of larger piping and better bends.