What Makes The Mufflerman One of the Best Car Repair Shops in St. Thomas? Every Mufflerman shop in southern Ontario operates on the principles of quality, service, and trust. Those principles have helped both the St. Thomas location and the wider company succeed for years; we've been operational in St. Thomas since 1979, and our first location opened its doors in Sarnia in 1964. Take a look at our Feedback and Testimonials page to get a better idea of why we've been able to stick around so long. When our customers bring their vehicles in for service, they can rest assured that our expert technicians will use the best available parts and provide a clear, transparent written estimate. Got questions about your quote? Just ask! We're committed to providing non-nonsense answers to anything you might be wondering about. more... See more text