stealth_GT

about to order some dual cut outs for my exhuast from quicktime performace, would it be a good idea to get some aftermarket high flow cats to go with it? the cut outs will go on after the cats.

Will I gain that much more performance over the stock cats? they're only like $200 and real easy to install,especially with the cut outs right there after...

mustangman02232

if you get a catted mid pipe and ditch the primary cats and the secondary cats you will see a differance, just replacing two of them with high flows on the stock exhaust wont do much.

UrS4

^^^ there are no secondary cats on the S197

According to Kooks, their hi flow cats flow nearly as well as catless systems.

stealth_GT

so are they a good idea?? I read on the other thread that the cats sit too far up or something like that , I forgot. The cut outs themselves are only like $45 each, so they are a pretty good deal. Gonna just do these first then possibly the addition of shorty headers JBA, to really get things flowing...

stealth_GT

I might as well just get the high flow cats as well, it looks to be an easy swap. The cut outs looks like they would be conveniently placed as well, real easy to just reach up under the car (when it's cool of course) unbolt the screws, take off the block off plate and ready to race.

(-:

had cut outs before, they sound bad ***! so much for 'stealth' mode lol...

slowstang06

yep dont be smart like myself and try swapping out the stock midpipe with an o/r one while the car was hot,and then let your arm touch one of the cats

hurt like a motha....

Hufenstang

the high flow cats flow extremely well.. I got the same power with my O/R h pipe as i did my h pipe with my welded in high flow cats.

MustangGT0405

I added highflow cats to my O/R pipe to clean up the sound. I bought the pypes hi-flow cats and they are small and very "Straight through" I could see through them.

I am no tree hugger so I dont care about emissions but I wanted a cleaner sound.

stang5151

LOL @ tree hugger comment.

stealth_GT

I am gonna get the SLP High flow cat H pipe and weld in the cut outs onto there, then weld in dual 18-20 inch resonators as well as the stock mufflers back on ( or possibly the GT500 mufflers).


High flow, clean quiet sound with the cut outs closed, BLARRINGLY LOUD with the cut outs open!