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Flowmaster FlowFX Axle-Back Exhaust Sounds Great On Ford Mustang GT

For the 2015 to 2017 Ford Mustang, the aftermarket offers countless modifications at more or less affordable sums of money. The Flowmaster FlowFX is one of the more expensive modifications out there, exclusive to Coyote V8-powered models at $504 including shipping.
Flowmaster FlowFX Mustang GT 6 photos
Photo: Flowmaster
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Part number 717749 comes in the guise of an axle-back exhaust, compatible with both the fixed-head coupe and soft-top convertible Mustang GT. “This system is perfect for the person looking for a moderately aggressive exterior and interior sound level with all of the performance benefits that you would expect,” promises Flowmaster.

409S stainless-steel is used for the mandrel-bent tubing, which ends with 4.0-inch stainless-steel tips embossed with the company’s logo and straight-through mufflers with 3.0-inch outlets for better performance. All necessary parts are included, including detailed instructions for installation.

Dyno-tuned and covered by a lifetime limited warranty, the Flowmaster FlowFX ships in three days after ordering with the help of UPS. In the case ground shipping exceeds three days to the customer’s location, the company upgrades to UPS 3-Day Select at no cost to the customer.

Except for Alaska, shipping is free within the continental United States of America. The question is, how does the Flowmaster FlowFX sound?

The specialist thought of that, uploading a video of a Grabber Blue-painted Mustang GT Fastback with the FlowFX on the dyno and on a straight piece of tarmac. Even at idle, the aftermarket exhaust gives the 5.0-liter naturally aspirated Coyote V8 a throatier sound that gets more aggressive as the revs climb up on the tachometer.

It’s important to highlight the $504.30 price is discounted from $799.95. Given that exhaust shops are much obliged to manufacture a cat-back exhaust at that price point, it’s a matter of preference if the customer goes to such shops for a deal or prefers Flowmaster’s lifetime limited warranty.

On an ending note, “this product can expose you to chemicals including nickel and chromium.” These are known to cause cancer and congenital disabilities, so be careful and take precautions when installing the FlowFX to your 2015 to 2017 Mustang GT.

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About the author: Mircea Panait
Mircea Panait profile photo

After a 1:43 scale model of a Ferrari 250 GTO sparked Mircea's interest for cars when he was a kid, an early internship at Top Gear sealed his career path. He's most interested in muscle cars and American trucks, but he takes a passing interest in quirky kei cars as well.
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