40 Series Delta Flow mufflers deliver aggressive exhaust tone with improved sound control compared to original chambered designs. Delta Flow technology helps reduce interior resonance while maintaining the deep, powerful exhaust note favored by performance enthusiasts.

The Flowmaster 40 Series Muffler is the original high-performance exhaust upgrade that revolutionized the muscle car sound. Known for its aggressive tone and deep, throaty rumble, this street and strip muffler is ideal for enthusiasts who want to be heard. The 40 Series delivers the unmistakable "Flowmaster sound" that defines American muscle. Whether you're driving a classic muscle car or a modern performance vehicle, the Flowmaster 40 Series Muffler is for you!

Flowmaster 50 Series Delta Flow mufflers are engineered to reduce interior drone and resonance while delivering a moderate, deep exterior tone. Designed with advanced Delta Flow technology, these compact mufflers are ideal for passenger cars, and weren't designed for trucks or SUVs—perfect for drivers who want performance sound without excess cabin noise.

Flowmaster 60 Series Mufflers utilize Delta Flow Technology to boost horsepower and torque in 4- and 6-cylinder vehicles. Their large case, short design improves fuel efficiency while delivering a mellow, quiet tone—ideal for daily drivers. Built from durable 16-gauge aluminized steel and fully MIG-welded, the 60 Series offers long-lasting performance with a smooth, refined sound.

The 70 Series Big Block Muffler features a longer case for increased volume and superior sound reduction, fitting applications where the wider 50 Series Big Block won't. Utilizing Flowmaster’s Delta Flow Technology, it provides maximum efficiency and minimal interior resonance. Ideal for street cars, trucks, SUVs, RVs, and tow vehicles, the 70 Series offers quiet operation with improved sound, making it perfect for those seeking performance with reduced noise.

The 80 Series Cross-Flow Muffler delivers true dual exhaust performance for classic muscle cars like Camaros and Firebirds, where only a single exhaust system fits. Designed to fit transversely behind the rear axle and in front of the fuel tank, it offers single or dual inlets, excellent ground clearance, and aggressive tone. Made from 16-gauge aluminized steel and fully MIG-welded, this muffler ensures maximum durability and a perfect fit for specialized applications.

Born from our Top Ten race muffler lineup, the Flowmaster Super 40 is built for street and strip performance. Engineered with Delta Flow Technology, it delivers powerful performance gains for high-horsepower vehicles. The oversized black case reduces interior resonance while producing that deep, aggressive exterior tone Flowmaster is known for. Perfect for muscle cars and performance builds that demand both sound and power.

The Super 50 muffler (formerly 50 SUV) features an expanded case size and advanced technology from the 50 Series Delta Flow. Its large tuning chamber optimizes exhaust flow, boosts fuel efficiency, and reduces interior resonance. Ideal for trucks, SUVs, and high-performance street cars, the Super 50 enhances driving comfort by lowering tone levels for everyday use. Perfect for those seeking better sound control and improved performance.

The 50 Series Big Block Muffler is our largest and quietest option, designed for tow vehicles, full-size trucks, large SUVs, and RVs. Ideal for big cubic inch engine applications, it features a large Resonance Tuning Chamber that virtually eliminates interior sound in large cab vehicles. With ample case volume to handle heavy loads, the 50 Series Big Block is perfect for tow vehicles, providing both reduced noise and enhanced performance under demanding conditions.

The 50 Series HD Heavy Duty Muffler is built tough for trucks, featuring 4.00-inch internal components and a large case size. Designed to boost mileage, torque, horsepower, and towing power, it enhances acceleration for both gas and diesel applications. Perfect for late-model trucks used in extreme conditions, the 50 Series HD delivers outstanding performance and durability, making it the ideal choice for heavy-duty applications.

Want the most aggressive-sounding Flowmaster muffler? The Super 10 Series delivers raw, race-ready sound that’s too intense for most street use. Designed for racing applications, the Super 10 features our proven Delta Flow Technology—also found in the Super 40 and Super 44—for maximum power and performance in a compact, high-impact design. Built for bold exhaust tone and serious performance.

The Flowmaster Super 44 is the most aggressive, deepest-sounding 2-chamber street muffler we've ever made. Designed with advanced Delta Flow Technology, it delivers a rich, powerful tone and top-tier performance. Choose from 409SS stainless steel with a lifetime warranty or durable 16-gauge aluminized steel with a 3-year warranty. Fully MIG-welded for strength, the Super 44 is the ultimate muffler for serious street performance.