To keep it legal depending on where you live you'll have to run cat-back. (i.e. if they do smog testing)

On the LB7 Duramax I should be able to run turbo back because there was no cat on my truck when it was produced...

If I'm wrong someone will quickly let us know.

[QUOTE=MRCapps;439250]Turbo Back or Cat Back?[/

Cat-back, but i have a striaght pipe to replace mt cat

i don't seem to have anyproblem with inspection with OUT a cat. and i go to a perty avrage garage.

Do i need to do anything with the computer if I open the exhaust?

i don't think you should have any problems......

No you'll be fine. You don't need to do anything...but opening the exhaust will allow you to open up the throttle a little more by keeping the egts down. Just watch your tranny if you go more than 60-80hp above stock power levels.

Banks makes a very nice set-up (duals), but I think you pay more for the name than the performance end. I have had both Banks, MBRP I would recommend MBRP good performance, sound. Not to mention the price!!!!
:humm:

Maybe I an retarded but I don't get what you mean.