this is for my 90 ef si. The stock cat has about 170k on it. I read somewhere that:
-as a cat gets older the material gets brittle and fall apart inside of the cat., thus
can effect poor exhust flow and performance.
*Is it true? I mean if it's really hurting my performance then i'll just go and get a strait pipe at MufflerMAN for $35.

I don't think that a really old cat is going to be even screening/catching all the toxins from the motor as it should when it gets that old.(170k and 14years old)

 

My cat on my Civic started to make rattle sounds kinda like a popcorn machine, thats why I replaced mine.

My Integra smells like eggs from the exhaust, I am guessing my cat is dead on that car to.

 

If your cat is stopped up, you'll be amazed at the power gain you get when you replace it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CWBETB &raquo;</TD></TR><TR><TD CLASS="quote">My Integra smells like eggs from the exhaust, I am guessing my cat is dead on that car to. </TD></TR></TABLE>Classic sign of a bad cat

 

Does your car move? A plugged cat will kill power. My sister's car wouldn't go up hills. replaced the cat and boom... no problems. In my case, it's my B16 breathing through an old *** cat and stock STD exhaust