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Hi I'm Justin with AmericanMuscle.com, and I'm taking a closer look at the Flowmaster American Thunder
classic axle back exhaust fitting the 2013 Mustang GT and GT500. The classic from Flowmaster
gets its name from the classic 40 series that produce that iconic Flowmaster aggressive
tone, but aren't quite as radical as Flowmaster's outlaw series. Flowmaster did choose to go
full stainless with the construction of this exhaust, and the added their signature black
finish to both the piping and the mufflers themselves, to further resist corrosion. Finally,
everything exits out these large 4" polished tips, embossed with the classic Flowmaster
logo. Since this is an axle back, the install should be a piece of cake, and take you no
more than an hour using basic hand tools. Now let's hear how the Flowmaster American
Thunder classic axle back sounds compared to our factory exhaust.