Specializing In Custom Exhaust Repairs. For over 23 years, Al's Detailing Sales & Service, located in Greeley, CO, has been specializing in muffler and exhaust repairs at affordable prices. Family owned and operated, you can expect honest, high quality work and unsurpassed customer service! Our services include, but are not limited to: • Stock mufflers • Performance mufflers • Dual exhaust • Catalytic converters • Brake service • Custom pipe bending • Car detailing Additionally, we have a lot full of outstanding pre-owned cars and trucks for sale. Call Al's Detailing Sales & Service today to schedule an appointment!