I was ready to gut out my cats on my 96 Z with a flowmaster muffler, but then thought about it and first question is will it mess up my A/F mixture or do i need to change my 0 2 sensor to adapt to the way that cat should have been made? The 2nd question is that it seems that my cats are welded in, has anybody else come across this problem, it makes it quite difficult to get off and clean out and put back on, thanks
Bill

 

This should be in the LT1 tech section. I'll move it there.