shawnaj7731

Here we go, my buddy has and an 02 gt and he is so cheap. He wants to put an aftermarket h pipe on with high flow cats but does not want to spend the money for it. So this what he told me he is going to do. As we all know we have 4 cats on our h pipe he says he going to cut the bottom two off and just clamp in some piping and that should be equal to him getting high flow cats. When told me this I could not stop laughing but he was so serious that he got pist at me for laughing, Please tell me this will not work work..........or is he correct. Is it even possible he wants to keep his car legal for inspection and he say 2 cats is fine.

tcuallstar

from what i understand, 2 of those "cats" are just resinators, im pretty sure your car will have a hard time passing inspection and you run the risk of getting a CEL

06mustang88

it's not inspection that you need cats for, it's emissions. if you live somewhere that you don't need to go through emissions, you don't need any cats at all

shawnaj7731

well we dont have emission here........... just a inspection if that is what you want to call it..........Will he gain anything by just removing the bottom two cats... more closer to the h pipe. then.

shawnaj7731

what if he puts on mil eliminators then.

06mustang88

any cat is going to restrict flow. the more he removes, the better flow he will get. as for just clamping on some pipeing...that kinda sounds ghetto and i'm not sure how well it will work. it might be ok, but IMO i'm the kind of guy who would just rather pay for the good stuff that i know will work well, but it's up to him not me.

shawnaj7731

yea......... that is for sure. Well if you get the high flow cat h pipe do you still need the mil eliminators then........

stangc83

well if you don't have emissions then you shouldn't need to worry. But you do need something that looks like a cat. because they may not do emissions but they do a visual check. i have a buddy that did that, and it sounded pretty good, a little more muffled then it should be but it wasn't too bad.

czwalga00gt

Wrong, the rears do absolutely nothing. I have a catted H pipe (2 cats) with my long tubes, thats essentially what he is doing, except mine is a shorty h. The o2 sensors plug in before and after the 1st cat... the o2's pick up nothing from the 2nd two.

Jiggy_One

The rear two cats are the real cats. The front cats are called PRE-cats. They are there to do the emissions job when the motor, and the rear cats are still cold. You know, so that you're not poluting the environment while your car is warming up. The front cats and the rear cats have that hightemp material that burns the excess gases that do not get burned during combustion. The front cats heat up much faster because of how close they are to the manifolds, but you still need rear cats to do the work when the system really heats up.