Cat Life Expectancy - Replacement?

[Scooby]

Guys;

Thanks in anticipation about replies involving dogs and birds but what I really want to know is the life expectancy of an aftermarket cat?

How can you tell if it's stuffed?

What's the current replacement of choice for a 3-4 inch system, GTR with 300 rwkw? I've heard good things about the Magic cats.

Cheers

[Scooby]

anyone?

[rd-runr]

Cats are suppose to last at least 100k km's, that's if the car is tuned properly ie. not running too rich.

You can tell if its stuffed if you can hear a rattling sound coming from the cat.

The magic cats are the way to go for a 3-4 inch system. There was a discussion on here a couple of weeks ago.

[Burto]

I'm running around 300awkw and went from no cat (car imported from Japan) to running a 4" Magic Cat and there was negligible difference in power - no more flames out the back though

[R31Nismoid]

the thing that kills a cat on a turbo car is not emissions.

its the heat

if you got a big turb... a cat probably will last ya 6 months

[mokompri]

a larger turbo wont necessarily cause the cat to die earlier... the main things that will affect its life is exhaust gas temperature (EGT's) and a/f ratios

[R31Nismoid]

well one would think a larger turbo running some good amount of boost would make a bit more heat that a stock turbo huh?

[mesh_]

Scooby, "why the concern?", as far as I know, GTR cats are already some of the best in the biz, Ben from racepace here in Melbourne is the bloke you should be talking to. he mentioned to me a mod he does to the stock gtr cats, where I think he cuts'em in half fits a 3'-3.5' pipe etc..anyway something like that. I was always under the impression cats only lasted around 60.000K's after that they're pretty much useless in restricting pollution.

[GTR32]

Scooby, "why the concern?",  as far as I know, GTR cats are already some of the best in the biz, Ben from racepace here in Melbourne is the bloke you should be talking to. he mentioned to me a mod he does to the stock gtr cats, where I think he cuts'em in half fits a 3'-3.5' pipe etc..anyway something like that. I was always under the impression cats only lasted around 60.000K's after that they're pretty much useless in restricting pollution.

Hi Mesh;

I'm concerned because it's not a standard GTR cat and it has at least 70k km on it. It's not so much the stopping pollution bit I'm worried about so, rather that it might be blocked.