Turbo back exhaust

[dontpaniccallamechanic]

Hi all

I just bought my first Duramax truck and I want to install a turbo back exhaust system. I am just worried about getting my inspection sticker later on down the road. Has anyone had any experience with that, especially in Texas, and do they even look at that on a diesel when doing the state inspection? Thanks for any knowledge you may be able to share.

D

[AU Alum]

They're still not requiring emission inspections on diesel trucks in CA. At least they didn't require one for my 2007.5 to get tags in 2008. I think I've read that they will eventually start requiring it soon, but I don't remember when. Not sure about TX; hope this helps.

[BigRedChevy]

Do you have a LB7 or LLY? Check the eigth digit of your vin if its a 1 you have a LB7 if its a 2 you have a LLY. If you have a LB7 you shouldn't have a cat and would have no problem with a inspection

[dontpaniccallamechanic]

It is the LLY, I have been under it and it has a cat. I realy doubt that an inspection shop would catch that but i hate to do the work by the exhaust and then have to take it out. My county does not do emissions at all but i know some places do a "visual inspection" of exhaust on vehicles.

Thanks for all the help

[Tow Master]

Hmm... You could always get a cat back exhaust then hollow the cat out or delete it. Then whe inspection time comes just put it back on.

Heres how Id delete it. Use a 3.5 pipe and 2 band clamps, Then at inspection time reinstall the cat!

(This is my muffler delete but same can be done with cat)

[dontpaniccallamechanic]

Thanks for the post.. I will most likely do that. I am going to leave myself some option such as what you suggested and replace the cat for inspection or worst come to worst re hang the OEM exhaust once a year. Kinda hate to go that far. I know most of the diesels I hear around here have turbo back systems so Im probably worrying about nothing. I like this option though thanks.

D