I think they are some what right because right after i pulled my cat my truck would fall on its face on heavy accelaration. After 2-3 days it "relearned" and ran much better than with the cat. I would never go back to having a cat

 

yep your right it is! Glad I don't have to worry about inspections!

 

What is the benefit of removing the cat?

 

Better flowing exhuast and no chance of it getting clogged up down the road

 

Tim, thats a good idea, Im going to do it, I only gutted the cat. how much is significative the poor flow for the chamber effect?

 

Really I don't think you will feel any improvement over just a gutted cat but if you have the time and it might be worth it. might drop EGT's a few degree's

 

OK, thanks Tim, Ill do it ASAP.

 

I did not think you would pass emissions without it. Just the visual hu? Ill give it a go.
Any one know if emissions standards are the same for all states? Except of course California.

 

here's a question for ya-
i keep hearing that Cali doesnt require diesel's to be smogged...
is this true? cause my truck has alot of smog crap that i dont want to leave on there...

 

This is what I wanted to do, but I don't have the equipment. I don't know what the inside diameter of the cat pipe is. I was thinking about having a muffler shop widen the cat pipe and slide a straight pipe through. I would then clamp the ends of the cat where the exhaust pipe attaches.

RÖENTGEEP - I'd be very interested in how you do this. Pictures and a write-up would be nice, too. Would you take some measurements of the pipe inside diameter and length used?

 

My cat has been lopped off and replaced with a pipe. Luckily, my state doesnt require an inspection or emissions test on diesel vehicles.

 

I think that the stock diameter outside of the cat is 3.5", and as I understood about what TJ wrote, is that you have to go to a muffler shop to wide the inside and outside of the cat, to the diameter you want to (3.5 or better 4") and then slide a straigth pipe through, as you also mentioned, and welding it with the cat, and thats it.

 

chaos ,in cal starting in jan '10 vechicles less 8501 g.v.w. & manufactured after '97, are to be smogged. so we are ok till then.

kurt

 

i live in ky. anything is a go as long as your smoke dont cause traffic to have to stop, but even then you get by most of the time

 

oh, heres a real easy mod- i removed a dead cat from the driveway earier LOL. all joking aside, when i pulled out of shop from removing cat i floored it and all the built up soot blew out and i couldnt see the muffler shop, literally