Can anyone reccomend a high performance cat? I have Gibson duals and will this give me more flow & power or better milage and sound?

 

what size pipes do you have? true duals or single in dual out?? and why didn't you add the highflows when they were in your exhaust system the first time??? you might want to consider an H or X pipe to balance things out

 

They are 2.5" or 3" & they are single in dual out. I know I should have! & which is better H or X pipe? What do you think for High flow cats?

 

I went with Magnaflow 94106. I gained a deep tone. I'm running 3" single in 2.5" dual out. I think thats the best way you could run with out losing low end torque. If you want a sound clip of Gibson & Highflows what is sounds like I attach the link.
http://www.youtube.com/watch?v=NcW0pIv9DgM

 

That is the ones I was leaning towards. Thanks for the info LincolnMark LT20! Is that your truck? Did you do an H or X pipe to balance it at all?

 

Did you notice any increase in MPG? I am going to have my truck dyno in a few weeks and also have them do a custom tune for it with an Xcal which I am sure I will see a huge difference. Then 1 last thing have my plugs changed also.

 

Yes that is my truck, I did not install H or X, because I have read of people losing back presser when installed true dual exhuast. where my Y ends I have 3" single tube and then 44 muffler 2.5" dual exit. I would like to try pacesetter long tube headers. Here is a link with Highflow cats & Super 44 muffler, I think it sounds way better then when I had my Gibson.
http://www.youtube.com/watch?v=RqDJdtn5hnM

 

I have not notice mpg because I can't keep my foot of the pedal, I bark my tires at every stop. I also had a tune for my cats because didn't want to buy the o2 ext and weld bug. I need to change plugs also but I'm scared that the dealer will brake plugs$$$$$$$$$ I have 51,600 miles.

 

I do need to get a tune in mine as I do have a slight boog in it when I put my foot into it. I believe it is do to the exhaust and also adding K&N CAI. I was also thinking about the headers as well but probably should do the tune first. I have delaying the plug thing also, scares the **** out of me! Bu I did find a dealer that says they can get them out & if any break they have extractor tools to get them out. I have 71,500 mile & still running strong.

 

I did a advance search and found this tool also.
http://www.sjdiscounttools.com/lis65600.html

 

u only need an X or H pipe if ur running a true dual system. a single pipe system is the best when run 3" from the Y out, or if SIDO 3" 2.5" out

 

i went with the magnaflow 94106 as well, 65.10 a piece off of ebay

 

$52.10 on performancepeddler.com