Flowmaster 717860 FlowFX Cat-Back Exhaust Kit Review: Unleashing Your Ram 1500’s True Voice

After spending considerable time evaluating the Flowmaster 717860 FlowFX Cat-Back Exhaust System on a 2019 Ram 1500 5.7L Hemi, we can confidently say this exhaust kit delivers exactly what Ram enthusiasts crave: that perfect balance between aggressive muscle and refined daily drivability. If you’ve been yearning to give your truck a deeper, more authoritative tone without the drone that makes highway cruising unbearable, this system deserves serious consideration.

What immediately impressed us about this Flowmaster setup is how it transforms the character of the 5.7L Hemi engine. The subtle rumble at idle transitions into a satisfying growl under acceleration, yet miraculously settles into civilized conversation levels at highway speeds. This isn’t just an exhaust upgrade—it’s a complete personality transformation for your Ram 1500.

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What Makes the Flowmaster 717860 Stand Out from the Competition

The FlowFX series represents Flowmaster’s answer to drivers who want performance without punishment. During our testing period, several distinguishing characteristics became immediately apparent. The dual 2.5-inch mandrel-bent 409 stainless steel tubing creates smooth, unrestricted exhaust flow that the Hemi engine responds to enthusiastically. We measured noticeable throttle response improvements, particularly in the mid-range power band where most daily driving happens.

The 4.5-inch black ceramic-coated 304 stainless steel tips provide that finishing touch that catches eyes at every stoplight. Unlike cheaper chrome tips that fade and discolor within months, these ceramic-coated beauties maintained their deep black finish throughout our testing period, even after exposure to harsh weather and road chemicals. The tips are substantial, well-proportioned, and positioned perfectly to fill the Ram’s rear bumper cutouts without looking cartoonish.

Installation Experience: Easier Than You’d Expect

We approached the installation with some trepidation—cat-back systems can sometimes be exercises in frustration with misaligned hangers and stubborn hardware. The Flowmaster 717860 pleasantly surprised us. The system is engineered specifically for 2009-2024 Classic Body Ram 1500 trucks with the 5.7L Hemi, and that vehicle-specific design shows in every connection point.

The entire installation took approximately three hours using basic hand tools and a quality set of jack stands. All factory mounting locations lined up precisely without requiring any modifications, drilling, or creative persuasion with a hammer. The included hardware is high-quality—not the cheap zinc-plated stuff that rusts after one season. Flowmaster includes detailed instructions that actually make sense, though anyone with moderate mechanical aptitude can handle this as a weekend project.

One installation tip from our experience: apply anti-seize compound to all bolt threads before assembly. This small step will make future maintenance significantly easier and prevent those frustrating seized-bolt situations down the road.

Sound Quality Analysis: Finding That Sweet Spot

Sound is inherently subjective, but we’ll attempt to describe what you can expect from this exhaust system. At cold startup, the Flowmaster 717860 announces itself with a purposeful rumble that’s noticeably deeper than stock but won’t wake the neighbors at 6 AM. As the engine warms, the tone mellows slightly into a smooth, muscular idle that reminds you there’s serious displacement under the hood.

Under moderate acceleration, the exhaust produces that classic American V8 growl that makes driving genuinely enjoyable. There’s a visceral satisfaction to hearing your engine work, and this system delivers that connection without becoming obnoxious. During our highway testing at 70-75 mph, cabin noise increased only marginally compared to stock—conversation remains easy, music doesn’t need excessive volume adjustment, and long road trips don’t become fatiguing.

The real magic happens during full-throttle acceleration. Plant your right foot, and the FlowFX system unleashes a glorious roar that does justice to the Hemi’s performance heritage. It’s loud enough to be thrilling but controlled enough that you won’t feel self-conscious pulling into your subdivision. This balanced approach is exactly what separates mature performance exhaust systems from the attention-seeking setups favored by younger enthusiasts.

Drone Testing: The Highway Comfort Factor

Exhaust drone—that resonant, headache-inducing frequency that turns highway driving into torture—is the nemesis of otherwise excellent exhaust systems. We specifically tested for drone across various speed ranges and load conditions. Between 65-80 mph, which represents the vast majority of highway cruising, we detected minimal drone. There’s a slight increase in exhaust presence around 1,900-2,100 RPM (approximately 72-77 mph in top gear), but it never approaches the invasive levels that ruin long-distance comfort.

Engaging the MDS (Multi-Displacement System) cylinder deactivation feature actually improves the situation further, as the exhaust note becomes even smoother during light-load cruising. This compatibility with the Ram’s fuel-saving technology means you’re not sacrificing efficiency for sound.

Build Quality and Materials: Designed to Last

Flowmaster constructed the 717860 using 409 stainless steel for the main tubing and muffler assembly. While 304 stainless steel offers superior corrosion resistance, 409 stainless provides excellent durability at a more reasonable price point and is perfectly adequate for exhaust applications. During our inspection, all welds appeared clean, consistent, and penetrated fully—hallmarks of quality manufacturing.

The mandrel-bent tubing maintains consistent diameter throughout each curve, eliminating the restrictions found in cheaper crush-bent systems. This attention to detail translates directly into better exhaust flow and improved performance. The muffler casing feels substantial, with heavy-gauge steel construction that should withstand years of heat cycling and road vibration.

Those 4.5-inch tips receive special mention for their construction quality. The 304 stainless steel core provides exceptional corrosion resistance, while the black ceramic coating offers both aesthetic appeal and additional protection against the elements. The tips attach securely with included clamps that actually grip properly—a small detail that prevents the embarrassing rattle of loose exhaust tips.

Performance Gains: Real-World Results

While Flowmaster doesn’t make outrageous horsepower claims, reducing exhaust restriction does provide measurable benefits. During our testing, we noticed improved throttle response, particularly from 2,000-4,500 RPM where most passing and merging happens. The engine feels more eager to rev and pulls more strongly in higher gears.

We didn’t have access to a dynamometer for precise measurements, but seat-of-the-pants impressions suggested approximately 8-12 horsepower gains—modest but noticeable during everyday driving. More significant is the improved exhaust note, which makes the existing power feel more substantial and engaging.

Fuel economy remained essentially unchanged during our testing. Over 500 miles of mixed driving, we saw no meaningful deviation from our baseline measurements. The MDS system continued functioning normally, allowing cylinder deactivation during light-load conditions to maximize efficiency.

Compatibility Confirmation: Does It Fit Your Ram?

The Flowmaster 717860 is engineered specifically for:

• Years: 2009-2024 Ram 1500 (Classic Body Style)
• Engine: 5.7L Hemi V8 only
• Configuration: Standard cab, Quad Cab, and Crew Cab with 5’7″ and 6’4″ beds
• Requirements: 2WD and 4WD models

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