SSI and ADD a cat?!

[JoLi]

I have an SC with headers and GT3 exhaust. Ample power, loud as hell and no heat. I live in Colorado and thus have similar smog rules as California, thus to be compliant I need to add a cat.

I'm thinking of swapping the Rarly8 headers for backdate style SSI heat exchangers, to get heat but keep performance. My question: can I add cat(s) to the SSIs? Is there room to cut up and add small cat(s)? If I would do it, would that impact performance?

As the car now is too loud I am also considering changing the muffler. Does that open up for alternatives if changing the SSI's is not an option?

Thanks!

[EdRogers]

You're going to need a stock exhaust system to pass emissions, with cat. And another vehicle to drive when it snows.... I would get a good used set and bolt them up for emissions, then change when you get home. If I lived in boulder, and wanted to use the car more than a couple of months, I would get some heat. Pretty chilly right now I bet. But, definitely a second car!

[Arne2]

It's been done, I recall seeing a thread on it here some time ago. Basically a pair os small cats welded into the SSI stingers on their way to the 2-in muffler. Room is tight, so very small cats are in order.

[Arne2]

Found it. Craig_D's Dual Cat SC Exhaust

Turns out it was done to meet Colorado tests, as well. Craig is local to you, you may want to contact him to check it out.

[Craig_D]

Well, I was about to chime in here, when I saw my post linked.

Hey JoLi, send me a PM and we can meet up so you can give a look and listen to my system.

[JoLi]

All good news there and thanks guys. I pm you my details Craig_d.

I have a stock 3.0 with cross pipes and cat and will do the smog test with that, so no probs.

Again thanks!

[KevinB_NJ]

If you plan on selling GT3 let me know! Good luck with the mod