The landscape for aftermarket exhausts changed dramatically when high-performance options like the Flowmaster 717864 FlowFX Cat-Back Exhaust Kit entered the scene. I’ve spent hours testing this kit on my 2013 F150 3.5 EcoBoost, and let me tell you, it truly stands out. The 3-inch mandrel-bent stainless steel tubing delivers a smooth flow that boosts power and sound without drone. The deep, powerful tone is perfect—noticeable outside but still refined inside the cab.
What impressed me most is the large 4.50-inch ceramic-coated stainless steel tips that give a robust finish and look great under the truck. The FlowFX straight-through muffler enhances performance, making a noticeable difference in throttle response and sound quality over stock. It uses the factory hanger locations for hassle-free installation, a real time-saver. After comparing several options, this kit’s combination of quality, sound, and performance makes it my top pick. Trust me, this isn’t just about noise—it’s about real performance gains and a fierce growl you’ll love.
Top Recommendation: Flowmaster 717864 FlowFX Cat-Back Exhaust Kit 3 Inch 409
Why We Recommend It: This product excels with its mandrel-bent stainless steel tubing for maximum airflow, a deep performance muffler, and bold ceramic-coated tips. Unlike cheaper alternatives, it balances durability and aggressive sound, adding noticeable power without excessive drone. It’s designed specifically for the F150 3.5 EcoBoost, ensuring a perfect fit and ease of installation.
Flowmaster 717864 FlowFX Cat-Back Exhaust Kit 3 Inch 409
- ✓ Deep, aggressive tone
- ✓ Easy installation
- ✓ Stylish large tips
- ✕ Slightly louder inside cabin
- ✕ Premium price
| Pipe Diameter | 3 inches |
| Material | 409 stainless steel |
| Tip Size | 4.50 inches |
| Coating | Black ceramic coated |
| Type | Cat-back exhaust kit |
| Performance Feature | Flow FX straight-through muffler |
That shiny Flowmaster 717864 FlowFX Cat-Back Exhaust kit has been sitting on my wishlist for a while, mainly because I’ve heard so many good things about its deep, aggressive sound. When I finally got it installed on my 2013 F150 3.5 EcoBoost, I was eager to see if it really lives up to the hype.
First thing I noticed is the massive 4.50-inch black ceramic-coated stainless steel tips. They look mean and really stand out, giving the truck a more aggressive stance.
The installation was straightforward, thanks to the factory hanger locations, making it a pretty hassle-free upgrade.
The real highlight is the sound. Inside the cab, the deep tone is noticeable without being overwhelming.
Outside, it’s loud enough to turn heads but not annoy neighbors—perfect for daily driving. The Flow FX straight-through muffler really delivers that deep, powerful growl that makes your truck feel more alive.
Performance-wise, the mandrel-bent stainless steel tubing ensures smooth exhaust flow, which should help with engine efficiency. I also appreciate how the kit maintains a clean look under the truck, with no awkward bends or fittings.
It’s clear this was designed with both performance and style in mind.
Overall, this exhaust kit gives my F150 a serious upgrade in sound and looks. It’s a great choice if you want a bold tone without sacrificing everyday comfort.
Plus, the polished tips add a final touch of rugged style I really dig.