07redMustang

Well today I was just thinking off the top of me head and thought about removing the cats and replacing them with a high flow magnaflow cats or another high flow cat. I know it wont be much of a gain like 10hp but I figured since I have headers and a cat back already the only bottle neck in the exhaust system would be the stock cats. Has anyone replaced their cats with high flow cats? I know it's not a common task, most people remove the cat and just run a straight pipe instead of replacing it with a high flow cat. I still want to pass emissions though so I was just pondering if it would be worth it. I think it would help out the tone of the exhaust nonetheless. What are your thoughts on the topic?

P.S. does anyone know if the inlet to the cat and the outlet are the same diameter? If so do you happen to know what size that is?

Thanks

themac5150

What are your present mods, what are your future intentions?

07redMustang

I have cai, headers, catback exhaust, 3.73 gears and a tune.

Future intentions.....anything really. I have plans to supercharge but not in the near future but sometime. Right now I'm looking to squeeze the most I can out of the n/a 4.0 and trying to make it sound the best it can. I'm not looking for anything over 5hp from removing the cats but if I can get somewhere around 5hp and a deeper exhaust tone I be all for it.

07redMustang

This is the cat I'm looking at

themac5150

Have you been tuned on a dyno yet? And what exhaust are you running?

07redMustang

No dyno tune yet but I have a performance tune from vmp. I'm running a Ninosport dual exhaust setup with a set of ebay shorty headers.

themac5150

Ok, is it the y-pipe kind that you just bolt on, or an x-pipe, or straight duals? What brand CAI?

07redMustang

Yeah it's the y-pipe kind for now but that will change soon. I will either be going to a custom x-pipe or a h-pipe. I have an s&b cai

themac5150

There ya go, you need to get an intake that increases your MAF housing. The S&B is a bolt-on and go, no tune required. Yes, the tunes you have definitely make a difference, but you will gain what you want with a C&L and 93 performance tunes. Or, buy a better intake and take your car to dyno to have it tuned. Canned tunes, custom supplied tunes, mail order, what ever you want to call them are not as good as YOUR CAR can be. They are as good as OUR cars can safely be because every car is different. Don't waste you money on cats. Where in Florida are you? I'd be driving to Jasper and let Doug touch my baby in the sweet spot!

07redMustang

Yeah I know there are other ways to get more power but right now I'm looking at the exhaust part of the car. I'm not expecting anything major I just want to know if I can see atleast a few ponies out of the swap or if the stock cats actually flow quite well. I'm in Jacksonville, which is like the top right of Florida. Jasper, Fl is only an hour and a half from here. I didn't know I was so close, lucky me.

Edit...Nevermind their in Jasper, Alabama not florida. I always wondered where they got their name, and now I know.