Clogged cat ?

I've had to replace two cats in two months :x .
What milage do you have on your truck 80,000-100,000+??? if so and you've never replaced the cat it's time.
Just don't get one of them hi-flow cats especially if your smog tests are as tough as here in California. There cheap as hell, don't last very long at all and will give ya a nice big FAIL on your smog test