Free Shipping On Orders Over $75. Details

Talk to an Enthusiast
1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $6,000! Enter Daily >

Ask a question about the
Flowmaster Original 40 Series Offset/Offset Oval Muffler; 2.25-Inch (Universal; Some Adaptation May Be Required)

Please tell us about your Mustang
Mustang
Don't see Delete Question 1 of 3
Ownership does not affect chances of winning
Please complete your Mustang info

Questions must conform to the question guidelines or they will not be accepted.
Terms and Conditions

Flowmaster Original 40 Series Offset/Offset Oval Muffler; 2.25-Inch (Universal; Some Adaptation May Be Required)
That Flowmaster Sound. Improve your Mustangs exhaust flow for an increase in horsepower and a deeper throatier exhaust note with a set of Flowmaster 40 Series Mufflers for a truly classic muscle car sound.

Superior Design. The Flowmaster 40 Series Mufflers are MIG welded from durable 16 gauge aluminized steel for durability and value. The 40 series mufflers use Flowmasters original two chamber design to increase power and sound. And each muffler is embossed with the "Flowmaster" name so you know it is the real article.

Modifications Required. This Muffler was designed to be used on mutliple applications, as it is not a direct fit replacement part. In order to install this Muffler properly on your vehicle, some modifications to the exhaust system will be required.

Application. The 40 Series Muffler's outer case measures 4" x 9.75" x 13", and features a 2.25" diameter inlet and outlet in an offset configuration. This is the perfect muffler for the 1979 to 2004 Mustangs. Excludes 1999-2004 SVT Cobra.