ryanvalin

I just picked up my 2000 Max, with 100,000 miles, and I was thinking about putting on a high flow cat.

How long do the stock ones last?
Does going with a high flow cat make the exhaust louder?
Is there any performance gain with a high flow cat?
What is the length of the stock cat?
When it gets plugged up, how would it affect performance?

Thanks for the help guys.

upstatemax

iTrader: (15)

A highflow Cat will not add any performance and it will change the tone a little on a stock car.

I changed mine at about 75k miles because of it being rusted to hell and it had a problem sealing with the new headers.

ryanvalin

The reason I ask how long they last is because my car has a hesitation in the midrange on acceleration around 3500 or 4000 rpm. It pulls good until there, but once it starts to rev higher, it gets flat, and hesitates a bit. I was thinking the cat might have something to do with it, if they tend to plug up around 100,000 miles.
I picked up some new plugs, and i'm going to clean out hte throttle body first. Then see if it's still doing it.

Gapp

iTrader: (3)

Maybe a VIAS problem?

upstatemax

iTrader: (15)

VIAS does not kick in till 5200rpms...

Sounds more coils on the way out.

Have you done a tune up yet? I would change the plugs first if you have not done that yet. I changed mine at 60k and they were shot...