A glasspack is a type of automobile muffler in which the exhaust gas passes straight through the center of the muffler. The basic design consists of one smaller tube centered inside a larger outer tube that …

Shop all MagnaFlow Glasspack Mufflers online now. Featuring a reversible straight-though design, buy the best glasspack muffler for your car, truck or SUV.

Summit Racing™ glasspack mufflers produce that powerful, distinctive rumble sound. And with a free-flowing design, they'll help you deliver the power to back it up!

Jun 6, 2024 · What Is a Glasspack? A glasspack muffler features a perforated exhaust pipe that’s surrounded by fiberglass (or sometimes steel wool) and then wrapped in a steel or aluminum shell. …

Upgrade your exhaust with straight-through glasspack mufflers. Discover options that balance power, sound, and durability for an optimal driving experience.

Thrush® Exhaust Since 1966...

Absorption and Glass Pack style mufflers are available in several brands with dozens of inlet/outlet size combinations.

Jan 4, 2026 · Understand the absorption mechanics of glasspack mufflers, the iconic sound profile they produce, and essential legal considerations for street use.

Jun 2, 2025 · Looking for a muffler upgrade for your truck? Let RealTruck help you decide between glasspack, chambered, or straight-through mufflers.

We manufacture each robust glasspack from heavy 16-gauge steel and add a high-temperature, corrosive-resistant red painted finish that will withstand temperatures up to 600 degrees F.