The classic Flowmaster 40 Series Muffler puts some real punch in your vehicle. The 40 Series is the original aggressive Flowmaster muffler, with maximized horsepower and torque gains. Plus, you get the massive roaring exhaust sound that made Flowmaster famous.
The Flowmaster 40 Series is made especially for those who love a big aggressive-sounding engine. The outside tone is loud and bold, and the high-volume interior resonance reacts to every nuance of your gas pedal. This sound-enhancing design is the reason the Flowmaster 40 Series is at the core of many Flowmaster American Thunder Exhaust Systems. The Flowmaster 40 Series is designed especially to satisfy those who drive classic muscle cars, dual exhaust rides, and off-road machines. Their 16-gauge aluminized steel and fully mig-welded construction resists corrosion and stands up for years of use and abuse.
Choose from a variety of sizes and inlet/outlet configurations for your Flowmaster Series 40 Muffler, and enjoy the feel of an American original. Backed by a 3-Year Warranty.
