Review on MagnaFlow 23451 Catalytic Converter Compliant by Will Kern

Just Perfect Fits my 1997 Cadillac Deville. No problem. The mechanic installed it for $75. My gas mileage went from 27mpg to 10mpg. It wasn't good so I started searching online to see what the problem could be. Sure enough, when I replaced the cat, my gas mileage jumped to 23mpg. Not as good as it was though, but there are other parts I'd like to replace to see if I can go back to my 27. When your cat is old and clogged, the engine can't breathe. This is not good for him. Couldn't be happier.