Is it good to remove the cat with stock exhaust?

i just removed the cat and muffler and i think it sounds great not as deep as other trucks with 4 and 5" pipes but turbo is lot louder and clearer 2 hear and when u get on it u get that deep rumble fallowed with that nice turbo discharge

Moved to Fuel System, Air, Exhaust, & Emissions Upgrades...

I also took my muffler and cat off. It sounds great to me and was alot cheaper than aftermarket set ups.

Removing the cat has excellent results, though it is illegal unless used for off-road racing applications.

Go for it. I love how mine sounds and the price was right... free

I got a 4" turbo back kit with cat delete pipe and I love it. A buddy of mine is jealous of my truck especially when it starts up because its got a nice initial "whoopmff" when you first crank it over.

I have a dpf delete pipe installed - did not buy the entire exhaust system, maybe I should have. Anyway, can I get a cat delete pipe that will delete the cat and bolt to my dpf delete pipe? Thanks

Yes you can, here is a link to the Flo~Pro unit, http://www.alligatorperformance.com/product_info.php?products_id=3787

Let me know if I can help,

Chad

Thank You Chad!

Remember that you will have to have the truck smoged next year and all the smog equipment will have to installed. Just as it came from the factory. If you remove anything, be ready to install it back to pass emission tests.

Remember that you will have to have the truck smoged next year and all the smog equipment will have to installed. Just as it came from the factory. If you remove anything, be ready to install it back to pass emission tests.

Is this for sure? My muffler guy told me about this and he told me he would put it back on for me.

yeah...its comin down the pike in 2010....

Is this for sure? My muffler guy told me about this and he told me he would put it back on for me.

Yes, emission testing is coming next year. My ending VIN is a odd number, so I will not have to have it smogged until 2011. I can pull the blocker plate and connect the PVC system, PPE back to stock in a few minutes-- my exhaust is stock. Even VINs will have to be smogged next year, 2010.

I have heard of some repair places in CA getting big fines for removal of smog equipment and most muffler shops will not remove converters because of that! :eek:

Yes, emission testing is coming next year. My ending VIN is a odd number, so I will not have to have it smogged until 2011. I can pull the blocker plate and connect the PVC system, PPE back to stock in a few minutes-- my exhaust is stock. Even VINs will have to be smogged next year, 2010.

I have heard of some repair places in CA getting big fines for removal of smog equipment and most muffler shops will not remove converters because of that! :eek:

So where do you find the info on all of this?

Here is a link to the info! http://www.smogcheck.ca.gov/

Besides the sound, is there any improvements in performance and/or mileage by deleting the cat? I am driving a bone stock 05 LLY.

Big Thanks to all who posted!!! Good Info.

Bump

Quick question is that smog testing and emissions testing for 2010 and 11 just for Cal? Cause I have an LLY and it sounds a heck of a lot better with the cat gone. The turbo whistles a little too much but gives it a deeper rumble and makes her sound good

I have to smog my truck next year....I'm going to try to slip through the smog check with a 4" pipe through the Kitty. Since in Calif, it's a visual and a smoke test, I'm betting they won't know the difference...My truck looks completely stock...They will be looking for visual items, tuners, guages, and the killer...If you have a Banks sticker they will be looking for mods...What really bothers me is that even if your truck passes the visual and a smoke test (Snap Test) you will fail if they can visually see a tuner...