Acura integra 01 L.s 2dr hatch

Have recieved 2nd opinon on check engine light diagnosic.Mechanic tells me that catalitic converter needs to be replaced and 02 sensor no replacement needed.Total estimate with parts and labor $668.00.Is this a fair price.1st shop estimate 1400.00 for cat coverter and 02 sensor they say needs to be replaced also. Any advice or do i need 3rd estimate. Thank you Jack

How many miles on the car? You’re still under federal warranty on the converter if you’re under a certain amount of miles I believe.

Car has 120,000 Thanks Jack