This question was asked by another member earlier this year and wasn't really answered. And yes I did do a search.
But first, I am not after suggestions for any after market exhaust solutions such as MBRP, Borla, Corsa & etc....
Now the question: Has anyone used either version of the GM "off road" catalytic converter delete pipes with the factory muffler?
If so, how much did it increase the noise in the cabin? I am not after more noise but am willing to deal with some additional noise as a result of using this pipe. Please post experiences with either of these pipes used in conjunction with the factory muffler . And yes I do know there are cheaper alternatives to these GM parts but call me crazy I am willing to pay for this part hence the "5150 in my name. Part numbers listed below.
Thanks:D

19156381 2006 Chevrolet Silverado, GMC Sierra Diesel Kit, Downpipe (off-road use only)

7802109 2001-05 Chevrolet Silverado, GMC Sierra Diesel Kit, Downpipe (off-road use only)

call me crazy I am willing to pay for this part hence the "5150 in my name.


Huh?

5150 is a ''van halen'' album and a police or cali state code for crazy person

Part number is wrong listed about. for 01-05 add a 1 in front.

Picture: http://www.gmpartsdirect.com/part_images/17802109%20(311%20x%20244).jpg

thats straght from GM, does it keep the warranty

interesting. on my 05 i bought a 03 front pipe from ebay and put it in. the turbo is lowered and the exhaust is alittle louder. nothing too bad

I have delete pipe for muffler and no cat. Only negative is drone around 2100 rpm's...it gets REALLY loud when straight piped...

johnathan, You did a cat-delete with the stock muffler?

I'm probably going this route but would like some input.

i took mine out with the stock muffler in there. sounds nice and gave alittle more power.

i took mine out with the stock muffler in there. sounds nice and gave alittle more power.

Good stuff. Thanks bud!

On this note though, does using a cat delete make the Check engine light come on on the Cal Emissions trucks? I think I remember reading this somewhere.

i have ordered the off road front pipe, or a pipe for a 01-04 with out the cat. i will report back if i get any check engine lights. still have stock muffler

I have a stock tune on my truck right now with no cat and there are no codes. i do use efilive most of the time with the codes off and egr off.

What does one of these Cat-delete Off Road Pipes run. Been thinking about the same for my truck.

171 shipped to my door from gm parts