What Makes The Mufflerman One of the Best Car Repair Shops in Chatham? The Mufflerman has been operational in Ontario since 1964, when we opened the doors for our first location in Sarnia. Eleven years later, in 1975, we came to Chatham, and have maintained a presence here ever since. Today, our business incorporates 12 locations across southern Ontario. That kind of longevity, success, and growth doesn't happen by accident. We've been able to maintain our presence in this part of the province because we're devoted to our three core principles: quality, service, and trust. Auto repair shops don't always have the best reputations; we strive to disprove the negative stereotypes by always providing friendly service, always using the best quality parts in your vehicle, and always delivering clear written estimates. If you've got questions or concerns about your estimate, come to us with your thoughts - we'll provide straightforward, no-nonsense answers to whatever questions you may have. more... See more text