Get yourself a Flomaster American Thunder axle back exhaust system for great sound and extreme performance for your 2011-12 Mustang. Designed for the serious enthusiast who really wants to get great sound from their Mustang, these mufflers will produce a deep & agressive exterior tone when on the throttle. You'll notice it inside as well letting you hear your engine roar. Stainless steel construction and easy installation makes this a top quality product that's ready to bolt on. Pick up a set today and feel the thunder!
As with all Flowmaster products, they are built in the USA and backed by their Lifetime warranty.
Video: 2011 5.0 Mustang Flowmaster American Thunder Axleback
Published on 2013-10-22
The Ford Mustang 5.0 liter engine is back and delivers an incredible 412 Camaro-smokin' horsepower. To match the factory's re-issue of the famous 5.0 liter nameplate, Flowmaster set about re-engineering their American Thunder Exhaust System to deliver that classic 5.0L sound along with additional fuel mileage and power. Stainless steel mandrel bent tubing, polished 4"tips, easy clamp-on installation and a Flowmaster 10-year warranty!
Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!
Installed on my 2011 GT. Very good quality, very simple install in my driveway. Fits and looks better than stock. As for the sound...much, much louder than I anticipated! Some of that may be do to that I have an off road x-pipe on the car, that by it's self made the car louder. Sounds VERY VERY good when you get on it, very deep base, HP sound : ) But it's a little too loud inside the car. I installed 2 layers of carpet padding on the floor of the trunk, up the back seats and under the speaker area in the back window and that killed a lot of that loud, annoying drone enough so I can keep the mufflers on the car.
Yes, I would recommend this item to a friend!
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Great sound and easy install
Jerry C. on
I installed these in about an hour using a socket wrench, floor jack and jack stand. Very easy install and they sound and look GREAT on my GT500. I really like the way the tips are finished with the rolled edge as opposed to the OE look.
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!
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LRS hands down is doing everything right. Every experience I have ever had with them shows just what an amazing company they are. There is a reason I come back time after time, instead of going to those "other" mustang aftermarket websites. Customer service is the name of their game, and they are winning. It does not matter whether you call, email, forum PM, or go to the actual store, they are always incredibly helpful and enthusiastic. (Getting to see the Cobra R in their showroom was awesome). I'm proud to have the LRS windshield banner on my car, because I know they will always have my back.