Single and Dual Aftermarket Systems

A Large diameter, straight-through, perforated-tube internal design that's flow tested and tuned to provide the proper amount of backpressure for maximum performance. Sound is mellow at idle and gets more aggressive as you accelerate--without annoying resonance. Fully welded mufflers built from 400 series stainless steel and have rock-wool sound insulation that'll outlast ordinary dampening materials. Made in the USA.
Flowmaster-Chambered mufflers that are made in the USA in a variety of designs, so you're sure to find the one that's right for your custom hot rod, high-horsepower musclecar, or hard-working truck. MIG-welded construction with precisely positioned sound deflectors to create that deep Flowmaster sound.