I was told by an auto repair shop in New Jersey that I needed to have both my catalytic converters replaced which would have cost approximately $1400. When I took the car in to Far East, Jon had quoted me less than that if it were the catalytic converters. After a day, Jon called me and explained he didn't think it was the catalytic converters, but he wanted to run some more tests to be sure. After a few flushes and oil changes, the car performed betther than it has in almost a year. Total Savings = over $1000. Believe the good reviews you read about this place, I'm glad I did. It definitely paid off.