Today is plenum day, unfortunately I have to pay a local to install to Hughes kit for me since I am at school and work. But I will be replacing the the cat since I think it is clogged I would like to go to a high flow for a little better performance and yea I will be replacing the first sensor and possible the second( just replaced when I installed my muffler) so what would everyone recommend I've googled this many time and I keep gettin the pipes and all I just want the cat so I can cut the old off and slip the new on ad weld it on. Please let me know what ya think!!!

 

Depends on location!

Feds want you to have a Cat, nobody cares about the Feds. State and Local Laws maybe require having a functioning Cat, which could be harder to squeeze by.

If you don't have to pass emissions, straight pipe to the muffler!

If you do, MagnaFlow High Flow Cat...

 

What year is your truck?

 

1998 1500 and I am not worried about the Feds here in the great state of Ohio but where I live these old people would sh*t a brick if my truck was any louder then what it is now. But I will be putting headers on soon!!!

 

Have a look at your cat, and make sure it is single in/single out. It change right around the 98 model year. If you are SI/SO, that makes it easy to just chop it out.

 

Mine is May '98, and the CAT is 2in 1out.
If you're doing headers, do an off-road 'Y'-pipe, no CAT (or a universal CAT), and a bigger muffler to tone it down.

 

My cat is two in one out, I would prefere to run a cat suggestions???

 

Post #6... use a high flow universal CAT after a 'Y'-pipe.

Or the Magnaflow highflow stock replacement.

 

Highly recommend ^^^^. Nice improvement and cheap to boot.

 

I looked at jegs and it was $216.00 doesn't seem that bad I it my truck back, had to go help the guy with some bolt removal since one snapped off right next to the head, but other then that it seems to be running great but is ideling right around 700 rpm to me that just seems low am I wrong or is their something else I need to add to the to do list?