lifted93xj

So i think my cat has a hole in it because i can see smoke coming for it whens it cold. The muffler shop wanted like 178 dollars for a new one. i dont have emissions but idk if i want to ran no cat. let me know what you think or where i can get a cheaper cat or whole exhuast.

XJ?2010

A little cheaper
http://www.quadratec.com/products/71410_100_07.htm

fivendime

If you have to run a cat because of emissions then this is what I would do. I would purchase your own cat, and then have the exhaust shop make you a "test pipe" to replace the cat. This way you can unbolt your cat for better performance or bolt in the cat for emissions. The "test pipe" is just a piece of straight pipe with two flanges on each end to bolt in place of the cat.

StillwaterEMT42

My friend bored out his cat, and then has it inspected by a good friend who "bypasses" that test.

lifted93xj

Hey guys read my thread i dont have EMISSIONS. i wanna know if its ok or good to run no cat. I dont have a cat on my turboed eclipse but my exhuast on that it just a 3in all the way from the turbo. thanks

indianajeepman

I would take it off and run straight pipes it sounds good or put a glas pack on it like i have it is a sweet sound

XJ?2010

well hollowing out a cat is bad cause you mess up the back pressure and putting a strait pipe in would be okay bu you wont have the EGT sensor thus making the check engine light on. But yes you can run no cat. just dont let the cops see ya.

indianajeepman

my light is not on its a 87 i think it just never had one i mean before i bought it the guy put a 1000 dollar exhasut on it and i bought it for 700 hahahah

86gtstang86yota86rokee

it will relieve some backpressure. not sure if thats a good thing or not. some cars lose alot of low end power with no cat but gain high end.
as far as emissions for all the who think you cant pass without cats its not true at all. its only a problem if youre area does a visual inspection for cats. i pass every year in my 86 gt mustang and it has no emissions and a offroad h pipe, egr block off plate, no smog pump, nada..
if the cats bad get rid of it. if you dont have a welder you will have to find a shop willing to weld up your exaust w/ no cat, alot wont for liability and shop reputation issues.if the cats plugged up as it maybe you sure will run alot better without it. if indoubt buy a high flow aftermarket cat. it will still keep some backpressure but open things up a lil.i doubt you will notice any differance though unless its plugged up now

indianajeepman

ya if you take it off i think it sounds like a tank with straight pipes hahah

funkle95xj

I just ran a turbo muffler where the cat used to be for a while. No shop needed, just a muffler and a clamp and a turndown tip. It didn't sound all that hot though, I've heard a glasspack sounds better. Another option if you're looking for ALOT of sound is to get a Magnaflow cat from Summitracing:

http://store.summitracing.com/partde...5&autoview=sku

Then a 90 degree bend off the cat to exit just before the rear wheel. It's LOUD, but it's pretty cool. Conversation can become a little difficult during acceleration though, lol.

ktmracer419

every time my exhaust was ripped off before the cat on any vehicle, i lost a tremendous amount of low end power, and it was just annoying. always weld it up when i get back home.

the bottom line is: run a cat. if you don't then that is more ammo for treehuggers to give wheelers a bad name. not to mention illegal

fivendime

Yes Sir! hahaha

I have mine on.

BuckB91XJ

We don't have to get smog tested so, the muffler shop took mine off when I had my exhaust system done.

FleXXedOUT88

i have no cat! with 2.5 in exhaust into a 12in long glasspac and then dumped at teh rearend! sounds good and actaully helped performance a lil bit!