Collins Muffler and Service is a full-service auto repair and custom exhaust specialty shop. We have been providing our customers with high quality, guaranteed auto, SUV, and truck repairs in the Greeley Colorado area since 1969. We service and repair most imported and domestic cars and trucks. Bring in your imported and domestic auto, SUV, or pickup today with complete confidence that your auto will be serviced or repaired correctly the first time. 



The best way to care for your car or truck is to follow the service intervals that your vehicle's manufacturer recommends. Collins Muffler & Service has the tools and expertise to make sure your ride runs exactly as its manufacturer intended it to. From reminding you about routine service intervals to ensuring that all fluids, filters, and hoses are in optimal condition, We take care of your vehicle and leave you with one less thing to worry about.



At Collins Muffler & Service we can create a custom-made stainless steel exhaust for your vehicle. We specialize in custom performance exhaust systems, stainless steel mufflers, mufflers, exhaust kits, racing mufflers, and exhaust accessories for a huge and diverse range of vehicles: customized cars, standard road cars, classic cars, kit cars, 4x4's, imports, and racecars.



Vehicles today are run by computers which control just about everything your vehicle does. How it drives, accelerates, starts, brakes, delivers fuel to the engine, etc. This makes modern day vehicles much more economical and responsive.  At collins Muffler & Service we use a state-of-the-art auto diagnostic equipment to analyze your vehicles computer and each of the engine sensors. The error codes your vehicle’s computer emits will point our technicians in the right direction and allow them to quickly and efficiently determine if your vehicle has a problem. When there is a problem, these sensors will send information about the issue to your vehicle’s onboard computer. This information from our car diagnostic service allows our technicians to identify the problems.

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Whether large or small, a business that depends on its fleet needs every vehicle in it to be in top running condition. This is why when it comes to fleets, routine maintenance that best ensures increased vehicle life and best prevents unexpected, costly breakdowns – is key.
At Collins Muffler & Service we know that when your fleet vehicles need service, it needs to be done fast and done right. We value your trust in us to deliver on both counts. We happily work with our fleet accounts to tailor programs that meet their specific needs. Please call us to find out how we can best accommodate your fleet maintenance and repair needs.



Your vehicle's transmission is perhaps the most complex and important component of the powertrain. It’s within the transmission where different gears are engaged to convert the power generated from the engine to the wheels. Manual transmission’s are a gear to gear design, while automatic transmissions have clutch packs, planetary gear sets and much more. High technical skill is required to work on a transmission of any type.