My auto service shop noticed an minor header exhaust leak in our Titan and recommended Mighty Muffler if I wanted an another opinion before spending $2,500 for the OEM replacement. (The header and front catalytic converter with sensors is one expensive unit). I arrived without an appointment and Greg and his assistant got the truck up on the rack after helping a customer ahead of me. They determined there was a minor leak and recommended it was not worth replacing at this time; no safety issue and it may not get any worse. They were friendly and helpful and did not charge me anything for their time. They just asked that I come back to them if I need help in the future. They also treated the customer ahead of me with the same care and offered an affordable solution to his muffler issue. I wish more businesses were like Mighty Muffler.