just wondering what should i be looking to pay for a hi flow cat? right now for a direct fit i've been finding them for a little over $300.00. And is it better to get a direct fit as opposed to a universal? let me kno what you guys think.

Mine was about $70, purplehaizer has a link to the one you need

This might help https://www.gmforum.com/t279772/

Thanks guys. I just PM'd you Purple but ur all over it man. Disregard the message.

Ok here are the stats on the cat i found, sound about right to you? Remember this for my 00 SSEi.

Part #: 602546
Inlet: 2.5"
Outlet: 2.5"
Overall Length: 16"
Body Length: 12"
Body Type: Oval - No Air Tube
Manufacturer: AP Exhaust / Goerlich
Model: 602000 Series
Material: Stainless Steel / Aluminized Heat Shield
EPA - Federal

Engine Limit: 5.9L
Test Weight: 6515 Lbs
CARB (California Emissions)

Engine Limit: 5.9L
Test Weight: 6515 Lbs

Call them and see of the 602546 is the replacement for the Goerlich 608227.

The 608277 might accept 3" in and out.

Ok i found the actual part number you listed. Does all this look correct?

Part #: 608227
Inlet: 3"
Outlet: 3"
Overall Length: 16.5"
Body Length: 12"
Body Type: Oval - w/ O2 Port in outlet
Manufacturer: AP Exhaust / Goerlich
Model: 608200 Series
Material: Stainless Steel / Aluminized Heat Shield
EPA - Federal

Engine Limit: 5.9L
Test Weight: 6250 Lbs
CARB (California Emissions)

Engine Limit: N/A
Test Weight: N/A

If you're going to go 3" down tube to cat, 3" out of cat to??? Yes. I opened my exhaust to 3" all the way to the "Y" and then went two 2" to Magnaflows.

Ok well i hadnt planned on opening to 3". So if i kept all the piping the stock size, what size inlet and outlet would i be looking for?

2.5" is stock