FireCode

iTrader: (1)

So the shop says I need 2 new front cats L&R but Im soo low on cash right now. Couldnt I just cut them out. I have read that this may throw the check engine light but I havent seen anything positive. What do you think guys?

Cloud9

iTrader: (2)

The SC300 has one cat underneath the engine and one cat in the mid section of the car.

The SC400 has two cats in the front and one cat in the middle (i believe).

With that said, you could probably remove the two front cats if you have a SC400 if your state has lax emission laws. It might throw some oxygen sensors in wack which might give you a check engine light.

The positives in removing the cats would result in somewhat better airflow and meaner sound. Remove the resonators while your at it.

got_trd

I have no cat's

FireCode

iTrader: (1)

so if you got rid of them then you did it yourself right? I just talked to the muffler shop where my car was and ofcourse they wont cut them out for me. It still seems wierd to me that both front cats would go out at the same time.....

got_trd

Go to another exhaust shop. Dont go to a big nationwide place. I got a 3" mid-pipe made yesterday that replaced where the cat used to be (even thought my cat was already gutted before that) no questions asked. I just didnt get a reciept

jgscott

iTrader: (1)

The fronts are a ***** to get out. Often they break the studs and then you have to drill it out and replace. Be carefull. Put Liquid Wrench on it over night before you try. Whats you car doing ? Check engine light ? That could also be the O2 sensor right ? Can you hear the Cats rattling like the inside has come apart ?

FireCode

iTrader: (1)

The car has a severe loss of power. The exhaust gets super hot even on short drives. the exhaust sound is way louder than it should be and I get a nasty rich gas smell. No check engine light. From the tests that the shop performed i was told that the 2 front cats where clogged. I ended up picking up all 3 cats to replace the old ones. I figured I might as well replace the third while Im at it. I will keeep you guys updated.

na4now

Pirate, How many miles on that stock exhaust?

Jordan

blacksc400

iTrader: (4)

you should be able to pick up a used stock exhaust at local junk yard, or at CL classicfield for dirt cheap.

SCV8

You should, but in our state at least, the wreckers aren't allowed to sell the cats; there's a racket on "refurbished" cats for a price.
If you could find a private owner parting out their car, that'd be the ticket.

FireCode

iTrader: (1)

There are 158,000 miles on the car. Yea I found out that the scrap yards didnt sell the cats which kinda sucked. Ohwell my car should be up and runnin by friday.

KidPandJ

Not to highjack the thread or anything, but i have a check engine light on and i was told by lexus its the o2 sensor, but my cats do make a rattling sound when i start off. Could the o2 sensor code be caused by a bad cat too? 150K stock exhaust by the way.