I have an 04 lb7 with a cat and egr. If I straight pipe it will there be a code?

No. Mine has been straight piped for three years.

mine is too no problems here

stright piped here.. no code

Does it make any difference that mine is a california truck?

if you have the EGR yes. It will be like a lly D-MAX and you will need a blocker plate and finger stick IIRC

I don't believe they make a finger stick for the LB7, but if it matters, my 03 that was Cal emissions (EGR and Cat) never threw a code with the delete pipe on. Several friends have them too, and never get a MIL. I would occasionally pop a silent P0401 code, but it never set anything off on the dash and never made a difference in performance.

Mine never has.LB 7 doesnt take a finger stick or blocker plate.

Does it make any difference that mine is a california truck?
No you can do what ever you want to the exhaust side of an LB7 and will not get any codes.

Go for it!!!!

Mine has cali emissions. No cat and no problems.

Ok good to know. 5" straight exhaust will be ordered in the next few days. I can't wait :)

Definatley straight pipe it...you will love the sound :D and throw no codes.

03 LB7, did a muffler delete last fall. No problems other than a speed limit change on my road near the retirement village. GRRR!

my lb7 isstraight piped no probs, no finger stick but it did take an egr blocker plate

1FastMax,

When you put the blocker plate on the EGR, are you throwing codes for it?

nope, now the guy that put it in for me has an lly with a whole egr delete tube and it throws a code for faulty egr system but it doesnt cause any problems

1FastMax,

Got all the information, thanks for all the PM Help.

:grd: my 04 has straight pipe, no code. p.s. no finger stick for LB7...:Handshake

beanerLB7,

Do you have an EGR Blocker plate installed?

That is where the finger stick would come into play if there was one for the LB7.

No codes, although Cali is a different world LOL.

No the LB7 engine will not throw a code. I have been running my 2004 LB7 for 2 years with dual 4 inch miter stacks in it and it has never thrown a code.