I'm getting ready to put a MBRP muffler on and I have a cat delete pipe I was going to use also. I'm wondering if removing the kitty really does anything as far as performance. Anyone know how restrictive the kitty is and is it worth the hassle of messing with it ?

 

i got about a 1 mpg from getting rid of mine

 

Where do you get a "delete pipe"? Is it home made? Id like one too!

 

check out mbrp's website. It's called a test pipe.

 

i just got rid of the cat and i love the sound. More feel flow. I have Magaflow Muffler and it great.

 

Well right on, thx man!

 

I went the other way. Straight pipe instead of muffler, still have the cat. I like it a lot...sure was cheap, too.

 

I wonder if anyone has done a dyno of before and after kitty removal ? I believe the kitty shouldn't be there but I'm not sure it's worth the hassle of taking it out then having to put it back in for emmision testing. If I could gain fuel economy by removing it then that would make more sense.

 

I opted not to remove the kitty, straight piped the muffler. The kitty only amounts to a couple pounds of back pressure, not enough to really make much of a difference. My other reason for leaving the kitty goes to the EPA and DOT. If you happen to get pulled over in a DOT check, they see no kitty, the fine is horrendous. They will not give you a fix it ticket, they can red tag you, and your truck will not move until you either install the CAT or on a flatbed.

CD

 

That right there is what worries me. I have never seen a DOT check point in AZ but I don't want to get nailed either. It's starting to sound like there is not a big enough bennifit to remove it.

 

I got about 2 mpg by removing the cat and the muffler. I got 4 inch pipe from a local steel distributer. I kept my GA registration, so I dont have to worry about emissions though.

 

Smells so much better without the cat.

 

you can avoid that by hollowing it out and running a pipe thru it and then put it back on

 

Your best bet is to delete the muffler, or run a performance muffler, and just keep the cat. Those claiming performance gains from ditching the cat are just trying to justify the choice they made. Too many problems for zero gain.

 

i have had no problems and can tell the difference. their is a lot of filtering material in it that seems to clog up. i would run a muffler before having the cat