Though the design of every Flowmaster product may look simple, each of these is actually crafted for optimum performance. It has taken years of hard scientific research for Flowmaster to develop its patented technology, resulting to a much improved engineering of all Flowmaster parts. The brand’s design uses the pressure and the sound energy released from the engine’s combustion chamber to scavenge or pull spent gases out of each cylinder more efficiently than even an open pipe system. This improved scavenging of the exhaust gases results to a more efficient charge of unburned fuel and air to fill the cylinders for the next cycle.

The design of the Flowmaster 70 series is no exception to the rule. It has been crafted for optimum performance and increased horsepower. The Flowmaster 70 series is specifically designed for large vehicles. The 70 series Big Block II mufflers sport a special resonant tuning chamber which makes them significantly quieter inside the vehicle.

For maximum volume and efficiency, these mufflers are designed around a large case. They are 2 inches smaller than the original Big Block Flowmaster mufflers, allowing for a much easier installation process when working in tight areas. The three chamber mufflers of the 70 series use a large case for an increased volume and added sound reduction. They will fit various applications, even those which are unable to accommodate the 50 series Big Block HD. These performance parts utilize the Flowmaster’s patented delta flow technology for maximum efficiency and efficient reduction of interior resonance. They are constructed from 16 gauge aluminized steel and are fully welded for maximum durability. The 70 series is perfect for high performance street cars, trucks, SUVs, RVs, and tow vehicles out there. So if you are looking for increased performance, then you better upgrade to the Flowmaster 70 Series.