Since 1978 Mufflers West has been providing it's customers with high quality trailer repair services. Our experts can repair electrical issues, brake problems, axle problems, and more. Just give us a call or stop by our location for a free estimate. Free Inspection Mufflers West has been proudly serving Temecula Valley and the surrounding areas since 1978 from the same location. Mufflers West is the leader in Temecula for exhaust systems, brake systems, installations and service for any make or vehicle model on the market. We're an independently owned and operated muffler shop. The Muffler is a metal container which reduces noise produced by the engine; something like a silencer muffles the discharge of a weapon. A damaged or faulty muffler will also affect engine performance.