Dynomax: Dynomax exhaust , mufflers and Dynomax headers offer great sounds and quality at an excellent price. Dynomax mufflers are constructed of only the highest grade materials to produce the consistent performance sound an enthusiast is looking for. Dynomax also produces the popular Thrush Muffler line, offering excellent performance at an unbeatable price. Dynomax exhaust systems and headers are designed to fit a variety of range of vehicle applications boasting the widest exhaust selection on the market. Dynomax has it all sound, performance, and durability.