TASHONSC4

im new to the site...i love my sc as yall do..i was drivin the other day and the car just lost all but like 15hp..the mechanic said it was the cats..the dealer wanted $1400 a piece for th both of them..i purchased two direct fits..will this make my car normal again??

JspecSC3

iTrader: (4)

I highly doubt your car will lose that much power due to a bad cat. If anything you gain power. Try getting a second opinion from another shop who specializes in Toyota/Lexus.

t70 supra

iTrader: (-4)

catless or go to autozone 1400.00 dude thats a 1jz swap with extras lol u need a new dealer cats run about 200.00 tops aftermarkets are even cheaper look at an eletronic exhaust cuout

SHOLEXMAN

Do you have emissions in the state of New York? I am leaning towards yes. Other then that a bad catalytic converter can definitely cause a engine performance problem. If someone hasn't done any maintenance to there car like spark plugs you have a problem. If the the check engine light starts flashing that is damage happening to the converter as a example. That is a type A misfire dumping lots of fuel which will melt your cat cause of serious temps. In turn the cat melts together and causes a blockage reducing performance. I have also seen people melt them because they put diesel in there tanks on the Lexus GX 470's. If you have a high mileage car they can break apart on the inside. If you hit them and it sounds like stuff is bouncing around obvious indication it is bad. Also make sure the bevels in your muffler haven't fallen apart inside either another possible blockage. If you can't cut them off and have a straight pipe made for it go after market like (T70 Supra) said dealer parts are very jacked up in price. Hope you get it taken care of !Later>>>

LEX_MAN

iTrader: (2)

I thought our cats are made of metal on the inside so they cant fall appart.

Kaydee

punch a hole thru them and you will see hp gain

JspecSC3

iTrader: (4)

They use serveral metals and fiberglass which eventually breaks down over time as the car runs richer. The richer you run the hotter your cats gets thus shortening their lifespan.

SHOLEXMAN

Yeah exactly, those go for a lot of money if people cut them off of cars. People steal those and sometimes get a couple hundred dollars for the big trucks. LEX_MAN everything breaks down on a car end of story any condition can happen. If that where true Toyota would be some rich basturds lol.

bigmalik00

On the SC400.. I think this may help

https://www.clublexus.com/forums/per...=ignition+coil

if it is truly the cats.. you can get some performance peddlers for cheap (magnaflos) and have the shop weld your old flanges to the new cats...( that is what I did)

TASHONSC4

Thank u guys...i took it to lexus and they said 99% sure the prob. Was the bad cats. They wanted 1400..i went to autozone and got the left one, and had to special order the right one. 700. I have the new left one on and the right one is hollowed out until i get the right one. This thing is loud as hell!! Wish me luck

Dv8

Have you not heard of test pipes??

5sp_jzz30

iTrader: (2)

700? are you insane?

you can get universal ones AND have them custom installed for half that cost.

i agree with the comment above. you should have just ditched the cats and put in test pipes.

rwdanthony

iTrader: (53)

left and right cats? i thought theres just the pre cat and then the cat behind the tranny?

OneJay

iTrader: (14)

^^Maybe is a 400?

StiCk3

iTrader: (5)

with 700 you could have found some universal cats, some magnaflow mufflers and some exhaust shop piping. You got owned dude...