Two catalytic converters???

[aovsi]

Has anyone ever installed two catalytic converters, two high-flow 3", one right after the other? Anyone thought of this? What do you think? Do you think I'm retarded? :laugh:

 

[stuffy1256]

well lets think logically, a which would be better, a regular 3" piping or a slightly constrictive cat, hmmm con constriction vs constriction, i think you can figure it out


ps if im completly wrong im an idiot i know, if im right then forget what i just said

 

[aovsi]

Originally posted by stuffy1256
well lets think logically, a which would be better, a regular 3" piping or a slightly constrictive cat, hmmm con constriction vs constriction, i think you can figure it out


ps if im completly wrong im an idiot i know, if im right then forget what i just said

Um, the car needs to be emissions-legal, Einstein. WRX's have two catalytics. I'm not sure about STi's.

 

[aovsi]

I guess I neglected to say it's a 14b with 3" exhaust. Two cats would probably provide me with enough restriction to ease lots of the creep.

I know it may retarded to a certain degree, but hey, it should work. No?

 

[Defiant]

Will the second one get hot enough to work?

 

[jonesjm82]

had a 97 cobra. had 4 cats. yes, 4 cats.

 

[f4st]

Originally posted by jonesjm82
had a 97 cobra. had 4 cats. yes, 4 cats.

why

 

[aovsi]

Originally posted by Defiant
Will the second one get hot enough to work?

That's what I'm fearing.

 

[25psi]

Originally posted by f4st
why

My dads truck has the same motor(4.6) and it has four cats to....one precat and cat for each bank of cylinders.

 

[bwhite]

My 93 mustang had 4 cats also, 2 for each side. But they worked to varying degrees. I dont believe putting two cats inline will accomplish the same thing. I installed an aftermarket high flow cat from bushur on my Laser and had to have it e-checked and it passed with no problem. Just make sure your car is good and warmed up. Dont go to the emissions center with a cold car. Your car needs to be up to temp so all the systems are functional. Having two cats in my opinion is a waste of money and wont buy you anything.

 

[supergoat]

I had a 96 Mustang GT. SIX cats. 3 on each bank. I still have that stock h-pipe with them on it sitting outside, everytime I look at it I cringe. My old RX-7 had 3.

 

[TurboDropTop]

Buddy of mine has a '95 mustang GT, i wanna say it has 4 cats

 

[wishihadatalon]

my sho has 3

 

[Omega]

LS1's have 4 cats also... or is it 3?

I lot of newer cars have 2 small ones right near the head and another 1 or 2 further back in the exhauset.

If I wouldn't just put another cat there.. get a resonator. In my car I have a cat, then a dynomax muffler, then a borla at the very end. I is still a little too loud for me so I think I am going to replace the first muffler with a resonator and the second with a dynomax muffler.