This Flowmaster American Thunder axle-back for 2013-2014 Ford Mustang GT's is a great way to increase power, get a lounder exhaust, and keep your S197 looking great! This kit features 3" piping and 4" tips for more exhaust flow to get the most performance possible. Made of T409 stainless steel, this axle-back is guaranteed to last and is backed by Flowmaster's lifetime limited warranty. Pick up this exhaust system for your Mustang today and give your S197 that true American muscle car sound!
Bought these about 3 weeks ago before I took delivery of my car. I've always loved a flowmaster sound. Normally, the American Thunder series has a 40-Series muffler which sound hollow, but good. These 60-Series muffler give a perfect deep, muscle sound. There is very little drone while cruising on the highway. They're tame, but loud. What I mean is that when you fire the car up, you know they're there. When you're idling, there is a nice hum and when you rip on it, it sounds like the 7th ring of hell has been opened. Highly recommend these.
Flowmaster - The Exhaust Technology Company Flowmaster operates the only exhaust Research & Design facilities of its kind in the world, centered around the SuperFlow SF-7100 engine dynamometer complete with E.C.A. (engine cycle analysis) equipment and also SuperFlow chassis dyno's.
Through use of these dyno's, Flowmaster's engineering staff can track the complete engine cycle in millionths of a second and can obtain exact technical data of each degree of cam rotation, from induction to the tip of the exhaust system, while also showing the power numbers that really matter, the power numbers "to the ground."
Flowmaster also utilizes Spectrum Analyzers to fine "tune" the sound of each of the eleven different series of mufflers that Flowmaster currently offers, both for peak performance and just the right sound levels and tones. Flowmaster's dedication to quality is what makes them the exhaust industry leader for Latemodel Mustangs and SVT Lightnings!