Catalytic Converter Replacement
So recently, on my 2003 nissan sentra xe, I took my car in for an inspection and failed due to code P0420. The serviceman there said it was most likely the catalytic converter, and it would have to be replaced. He gave he a quote of $1000 to replace the Cat, and said it would include labor, and the price of the Cat. Is this a reasonable price? And also instead of just getting another OEM cat, would getting a bolt on Highflow cat be cheaper. I can definitely DIY a bolt on.