deadmeat2004

My cat is shot..sounds like a can with some rocks shakn' in it... what would happen hp,torgue and mpg wise and sound with it removed? im thinking about just replacing it with a cutout or something...
what size pipe whole do i need for it too? 2.5'? like this?? http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW
thanks

Black94Camaro

my cats out.

im guessing u have a 3.4? I do so this is how it is....

Pros:
1. About 1 - 2 mpg more
2. 10hp more, guy at the shop said a 10% increase which would be about 15 - 16hp, i doubt it
3. better airflow will run cooler... i have never seen my gauge above halfway (210° F) even in traffic with AC on

4. sounds better, more of a gurgley sound. you can hear it when u rev it. or going uphill in low RPMS

Cons:
1. exhaust really stinks
2. illegal in some states

blackFbird_98

^^^^ like he said I did it on my 98 3.8 and would recommend it if it is leagle in your state but you will need to plug in a O2 simulatro like in RK sport where you O2 sensor plugs into your cat

deadmeat2004

the 3.4's dont have a o2 on the cat, but thanks guyz. that told me what i need to know. if anybody else has an opinion that would be great.
and is our pipe 2.5? im thinking about putting a cutout on it too.

BadLilv6maro

Im having the same noise problem with my 94 3.4... but unfortunitly my state requires a cat. any good recomendations on where to buy a new one from?

deadmeat2004

click on the link i have above. its a magna flow High Flow

brink

<- no cat and no o2 sim..

w00p.

my SES light SAYS on lol but i took it to autozone and it threw 2 cat. codes .. and i dont have a cat, so i guess its nothing to worry ab


Why would i need to get a o2 sim? everyone is telling me my car will perform better, but i mean wouldnt it be the same except no SES light?

Camabird

The computer takes data from all the the sensors to tell how much fuel the motor needs and how much air, etc. If you take away a sensor it's not gonna know what to do so it will run in a "safer mode" to prevent things from breaking. I noticed a difference when I got my o2 sim, car was running really rich before it for some reason.

deadmeat2004

the 3.4's dont have an o2 on the cat...

deadmeat2004

what sixe cutout do i need?? is it 2.5? how big is the factory exhuast?

brink

holy ****, that could be why i cant rev past 4000 rpm in drive and i cant burnout b/c it stalls @ 2500 rpm when i hold the brake down.

EH?

Wolfie

i'm not 100% but i think the factory size on a 3.4 is 2.25

deadmeat2004

well, i took the cat off, gutted it like a fish and threw it back on. i like the new sound. its louder, but not that much. im very happy with it. thanks everyone.
So the exhuast is 2.25?