Collection: Auto - Insert Muffler

Control your exhaust volume without sacrificing flow using our selection of Auto Insert Muffler components. At DIY Customs, we provide high-performance louvered core baffles, durable collector inserts for race headers, specialized glass-packed silencers, and heavy-duty spiral-flow inserts designed for a perfect fit. Whether you are quieting down a loud track-day rig to meet decibel limits, fine-tuning the growl of a custom hot rod, or adding backpressure to improve low-end torque on a performance build, our professional-grade hardware offers the acoustic control you need at unbeatable prices. From specialized Auger-style inserts for side pipes to adjustable "lollipop" baffles and high-temp packing materials, we carry the essential gear to dial in your vehicle's signature sound. Don't see the specific pipe diameter (2", 2.5", 3"), insert length, or specialized noise-reduction rating for your system? Hit the live chat or call 412-882-8346—we can special order and drop-ship exactly what you are looking for directly to your doorstep!