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Race Mufflers

In 1983, Flowmaster® mufflers were conceived as a solution to a growing problem with sound issues at race tracks in California and beyond. In his successful effort to quiet race cars without reducing performance, our founder refused to accept the status quo of the day and instead pushed exhaust technology beyond common thinking. This led to many firsts in automotive exhaust science.

Delta Force® Race Mufflers by Flowmaster

From Street Stock to World of Outlaws, Flowmaster Designs and builds race mufflers accessories and systems for all types of motorsports. Each one a winner

No matter whether you race on the packed river gumbo of Knoxville or the loose sands of Baja. Whether you race down the quarter mile at Panama or the high banks of Michigan. Whether it's a bullring or a super-speedway, your race cars performance can improve with the installation of a Flowmaster muffler. Need more proof? Just look at who's winning at the strip, the oval track, or the road course, and if it carries a muffler, chances are it's a Flowmaster. So if you don't have Flowmasters now, don't let another race go by without 'em.


While racing is where we began, we've never rested on our laurels. Development of new Flowmaster race mufflers is a continuous process. Take our Professional Series mufflers, where we've added Delta Flow® technology to create the Delta Force® line. These mufflers provide maximum scavenging for added torque and horsepower inn race applications. This revolutionary technology has allowed Flowmaster to shrink case sizes for improved ground clearance, while at the same time reducing exterior sound level and interior resonances, major causes of driver fatigue.

Narrow Results
Inlet Diameter (in)
  • 2.5
  • 2.25
  • 3
  • 3.5
  • 4
  • 5
Outlet Diameter (in)
  • 2.5
  • 3
  • 3.5
  • 4
  • 5
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Type of Muffler
  • Chambered
  • Laminar Flow
Body Length (in)
  • 5.5
  • 6
  • 6.5
  • 7
  • 7.5
  • 8.5
  • 9
  • 10.25
  • 11
  • 11.5
  • 12
  • 13
  • 13.5
  • 14
  • 16
  • 17
  • 20
  • 22
Inlet Position
  • Center
  • Offset
Outlet Position
  • Center
  • Offset
  • Same Side
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