Flowmaster 40 Series Muffler - 43041

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  • Flowmaster Exhaust | Part Number: FLW43041
  • Type of Muffler:Chambered
  • Inlet Location:Offset
  • Fitment:Universal Fit
  • Material:Aluminized Steel
  • Tube Size (Inlet/Outlet):3 Inches/3 Inches
  • Outlet Location:Centered


The muffler that started it all, the original 40 Series Muffler is an aggressive sounding street/strip muffler that delivers the powerful Flowmaster Sound You have heard so much about. If you really want to hear your exhaust system and that great muscle car tone from both inside and outside of the vehicle - the 40 Series is for you

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Question & Answers

1 Answered question

Is this muffler a good upgrade for a 2009 F250 w/6.8L gas engine? Im looking for a deep aggressive tone.

Asked by Jimbo from Washington State on

Jim- Thanks for asking. The Flowmaster Exhaust 40 Series Muffler would be a good choice for your 2009 F-250 w/6.8L

Answered by DP from Washington State on


For over 30 years, Flowmaster has been producing exhaust products to combat noise issues that first cropped up on race tracks in California. The question was how to reduce sound without compromising performance? Advanced engineering and ample testing set Flowmaster's product line apart from competitors and a few of their more noteworthy parts include chambered mufflers, laminar flow designs and high flow catalytic converters. We carry Jeep exhaust pipes, exhaust flanges and complete exhaust systems among other Flowmaster products. The company's patented technologies, innovative designs and focus on performance keep Flowmaster at the forefront of aftermarket exhaust manufacturers. Shop Flowmaster Exhaust Now