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the Pro Series mufflers consistently delivered performance that is equal to or surpasses open pipe systems
The steel is covered with a durable carbide black powder coat finish for dependable corrosion
It offers many of the same great benefits as the RB10
2007-2018 GMC Sierra 3500 HD
Dimension: 64 x 9 x 8 inches
Flowmaster 9425452 Super 44, Delta Flow Muffler FLX-COST-2 the Pro Series mufflers consistentlyFlowmaster's Super 44 muffler uses the same Delta Flow technology found in our larger Super 40 mufflers. The Super 44 delivers a powerful rich tone and is the most aggressive, deepest sounding, highest performing four inch case street muffler we've ever built! Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
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