This muffler employs Flowmaster’s patented Delta Flow Technology which reduces interior resonance and increased efficiency, and is aimed for use on trucks, SUV’s, RV’s, tow vehicles, and high performance street cars such as our El Camino in which a quieter tone is desired. The 70 Series Big Block II Muffler is a three-chamber design, which incorporates a longer case for increased volume inside the muffler and lower sound levels. Producing over 600 tire-roasting horses, this El Camino is the perfect test bed for this collection of mufflers. We recently tested five of Flowmaster’s latest and most popular performance mufflers for a sound comparison on a classic 1972 Chevrolet El Camino with a Pat Musi Performance 509 cubic inch engine under the hood. The company’s modern line of mufflers are the result of years of development with racing engine builders, thousands of hours of research and development on the dyno, and real-world testing on the race track and the streets of America. The company boasts the only exhaust research and development facility of it’s kind in the world – utilizing SuperFlow engine and chassis dynos to fine-tune the design and sound of its exhaust systems.

Today, Flowmaster is comprised of three modern facilities in California and Idaho, employing over 250 workers. “Between all of those benefits, there are few products that you can put on your car that do all of those things in one easy bolt-on install,” says Flowmaster VP of Marketing Cam Benty.

What began as a mission to quiet race cars without a loss of horsepower evolved into designs and products able to not only quiet the vehicles, but increase horsepower and fuel economy and provide a great new sound as well. With humble beginnings in 1983, founder Ray Flugger created Flowmaster’s first patented design of a silencer for race cars in an 800 square foot barn in Kenwood, California. And Flowmaster Mufflers, a name is which is synonymous with high performance exhaust and whose products emit a truly unmistakable tone, is quite commonly the go-to source to satisfy your high-horsepower needs. If you’re like most automotive enthusiasts, the modification of your high performance street or strip vehicle begins with the removal of the stock exhaust to make way for a deeper-sounding, more powerful aftermarket exhaust system.

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