The 6.4L 392 HEMI in the Scat Pack Charger already sounds mean, but the factory mufflers hold back a lot of the character that big V8 wants to deliver. The right exhaust wakes up the mid-range growl, sharpens throttle response and gives you a deeper, more aggressive note without turning your daily commute into a headache. The hard part is choosing between a full cat-back and a simpler axle-back, and figuring out which brands actually fit a 2015 to 2023 Charger without rattles, drone or fitment headaches.
We focused on systems that bolt up to the Scat Pack 392 specifically, weighing tone, drone at cruise, stainless steel quality and how clean the install is. Below are seven exhaust setups that genuinely earn their spot, ranked best first, from aggressive race-ready cat-backs to street-friendly axle-backs that keep the peace on the highway.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Borla S-Type Cat-Back Exhaust (140542 / ATAK series) Best Overall T-304 stainless cat-back, 2.75 in tubing, dual split rear with 4 in tips |
9.5 | 🛒 Check Price |
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Corsa Performance Xtreme Cat-Back Exhaust (14542 series) Best Drone-Free Sound 3.0 in T-304 stainless cat-back, RSC technology, 4.5 in polished tips |
9.3 | 🛒 Check Price |
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MagnaFlow Competition Series Cat-Back Exhaust (19303 series) Best Build Quality 3.0 in mandrel-bent stainless, straight-through mufflers, 4 in dual-wall tips |
9.1 | 🛒 Check Price |
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Flowmaster American Thunder Cat-Back Exhaust (817824 series) Best Classic Muscle Tone 409S stainless cat-back, Super 44 style mufflers, dual rear exit tips |
8.9 | 🛒 Check Price |
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Borla S-Type Axle-Back Exhaust (11906 series) Best Easy Install T-304 stainless axle-back, straight-through mufflers, 4 in dual tips |
8.7 | 🛒 Check Price |
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MBRP Armor Pro Cat-Back Exhaust (S7100 series) Best Aggressive Value T-304 stainless 3.0 in cat-back, dual split rear, 4 in tips |
8.5 | 🛒 Check Price |
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Roush Performance Axle-Back Exhaust (Charger 6.4 application) Best Balanced Daily Driver 304 stainless axle-back, performance mufflers, dual round polished tips |
8.2 | 🛒 Check Price |
1. Borla S-Type Cat-Back Exhaust (140542 / ATAK series): Best Overall
Borla has been the benchmark for muscle car exhaust for decades, and the S-Type cat-back for the Scat Pack 392 is the system most owners end up comparing everything else against. It uses Borla’s patented straight-through, multi-core muffler design that delivers a rich, layered tone instead of a flat raspy buzz. On the 6.4L HEMI it produces a deep idle, a snarling mid-range and a genuinely intimidating note at wide-open throttle, all built from T-304 stainless that holds up to weather and heat far better than the cheaper 409 grade many rivals use.
The honest weakness here is volume. The S-Type is aggressive, and on a long highway stretch some drivers notice more cabin presence than they expected, especially with aftermarket tunes that add cylinder deactivation overrides. If you want truly quiet cruising you may prefer the Touring version or add a resonated mid-pipe. For everyone chasing the definitive Scat Pack growl with bolt-on fitment and a warranty that outlasts the car, this is the one to beat.
- Patented multi-core straight-through mufflers tuned for the 392 HEMI
- T-304 austenitic stainless steel resists rust and discoloration
- Aggressive cruise note with controlled drone on the highway
Pros: Iconic Borla tone with a clean idle and a hard pull up top; Million-mile warranty and proven long-term durability; Mandrel-bent tubing keeps flow high without sacrificing daily manners
Cons: Loud enough that some owners add resonators for long road trips; Premium build sits at the higher end of the value scale
2. Corsa Performance Xtreme Cat-Back Exhaust (14542 series): Best Drone-Free Sound
Corsa built its reputation on solving the one thing that ruins most loud exhausts, the constant droning frequency at cruising RPM. Their patented Reflective Sound Cancellation technology uses precisely tuned internal passages to cancel that specific frequency, so the Xtreme cat-back roars under throttle yet goes near silent at a steady 70 mph. On a Scat Pack that you actually drive every day, this is the difference between loving the car and dreading the commute.
The Xtreme tuning is the most aggressive Corsa offers, and that is also its catch. If you live somewhere with strict noise rules or you idle in a quiet garage every morning, the cold-start volume may draw attention you do not want, in which case the Sport version is the calmer sibling. But for the driver who wants brutal acceleration sound with zero drone penalty, the Xtreme is a very refined high-performance systems you can bolt onto the 392.
- Patented Reflective Sound Cancellation eliminates interior drone
- Aggressive Xtreme tuning that stays civil at part throttle
- Larger 3.0 inch tubing for the high-output 392 HEMI
Pros: Loud and mean under acceleration but quiet at cruise; RSC technology genuinely kills the highway drone problem; Premium fit and finish with heavy-gauge polished tips
Cons: Not the cheapest route to a Scat Pack growl; Xtreme sound can be too much for noise-sensitive neighborhoods
3. MagnaFlow Competition Series Cat-Back Exhaust (19303 series): Best Build Quality
MagnaFlow’s Competition Series is the choice for owners who want the loudest, deepest setup with bulletproof construction. The straight-through, perforated core mufflers flow as freely as anything short of a muffler delete, and the result on the 6.4L HEMI is a thunderous, low-frequency rumble that fills your mirrors with attention. Everything from the mandrel bends to the dual-wall polished tips feels heavy and serious, and the welds are clean enough to inspect with pride.
The trade-off is that Competition really means competition. This is among the louder systems here, and at idle it announces itself to the whole block, which is wonderful at a meet and less wonderful at 6 a.m. in a townhouse driveway. If you want a touch more restraint, MagnaFlow’s Street Series dials it back. But for raw, deep, no-apology Scat Pack volume backed by genuinely excellent build quality, the Competition Series delivers.
- Straight-through perforated core mufflers for maximum flow
- Stainless mandrel-bent tubing with dual-wall polished tips
- Deep, throaty Competition Series tone tuned for big-displacement V8s
Pros: Durable construction that feels built to outlast the car; Deep aggressive note without excessive high-frequency rasp; Direct bolt-on fitment with welded hangers in the right spots
Cons: Heavier presence at idle than some HOA-friendly options; Polished tips need occasional cleaning to stay looking sharp
4. Flowmaster American Thunder Cat-Back Exhaust (817824 series): Best Classic Muscle Tone
If your idea of the right Scat Pack sound is the deep, loping rumble that defined American muscle cars for generations, Flowmaster’s American Thunder is built to scratch exactly that itch. The chambered muffler design produces that signature throaty bark at idle and a hard, aggressive crack when you get on it. On the 6.4L it leans into low-end torque and gives the car a mean, traditional voice rather than the high-tech tone some newer systems chase.
The honest downside is drone. Flowmaster’s chambered design is famous for character, but that character includes a noticeable resonance band at certain cruising RPM, and the 409S stainless, while solid, is not quite as corrosion-proof as the 304 grade in the pricier kits. If you cover a lot of highway miles you will hear it. For weekend driving and short hops where that classic muscle rumble is the whole point, it is a tremendous amount of attitude for the money.
- Delivers the unmistakable old-school Flowmaster rumble
- Mandrel-bent 409S stainless tubing for solid corrosion resistance
- Tuned for strong mid-range torque on the 392 HEMI
Pros: That classic American muscle bark people instantly recognize; Strong value for a name-brand stainless cat-back; Straightforward bolt-on install with no cutting required
Cons: More interior drone than RSC-style systems at highway speed; 409 stainless can discolor at the tips over time
5. Borla S-Type Axle-Back Exhaust (11906 series): Best Easy Install
Not everyone wants to drop the whole mid-pipe, and the Borla S-Type axle-back is the answer for owners who want that signature Borla tone with a driveway-friendly install. Because it bolts to the factory mid-pipe, you can have it on in an afternoon with hand tools and ramps, no welding or cutting involved. You still get the straight-through T-304 stainless mufflers and the same family voice as the full cat-back, just in a more accessible package.
The compromise is in the gains. Keeping the stock mid-pipe means slightly less flow and a more moderate volume bump compared to the full S-Type cat-back, so power-hungry owners chasing every last bit of breathing will feel a little left out. The tip alignment can also sit a touch differently than the factory cutouts depending on model year. But as the simplest, most reversible way to make a Scat Pack sound dramatically better, this axle-back is hard to argue with.
- Bolts directly to factory mid-pipe with no cutting
- Borla S-Type tuning in a simpler axle-back package
- T-304 stainless mufflers and polished 4 inch tips
Pros: Quickest path to the Borla sound with a basic toolset; Reuses the factory mid-pipe so install is fast and clean; Million-mile warranty carries over to the axle-back design
Cons: Less volume and flow gain than the full cat-back; Tips slightly different position than some factory bumper cutouts
6. MBRP Armor Pro Cat-Back Exhaust (S7100 series): Best Aggressive Value
MBRP’s Armor Pro line brings genuine T-304 stainless construction to a more attainable spot on the value ladder, which is exactly why it has a loyal following among Scat Pack owners who want maximum volume without paying top-shelf prices. The 3.0 inch mandrel-bent tubing flows well, the hardware is good quality, and the tone is unapologetically aggressive, all snarl and crack with very little holding the 392 back.
That aggression is also the catch. The Armor Pro is one of the louder, rawer-sounding systems on this list, and it does carry more highway drone than the drone-canceling designs, plus the tone is a bit less polished and layered than the Corsa or Borla units. If your priority is the most attention per dollar and you do not mind a loud cabin, it punches well above its weight. Buyers who value refinement over sheer volume should aim higher on this list.
- T-304 stainless throughout for long-term durability
- Mandrel-bent 3.0 inch tubing for strong V8 flow
- Loud, race-forward tone that leans into the 392's aggression
Pros: T-304 quality at a friendlier point on the value scale; Very aggressive note that fans of loud setups love; Solid hardware and hangers for a clean bolt-on fit
Cons: On the loud side with noticeable drone at cruise; Tone is less refined than the premium Corsa and Borla kits
7. Roush Performance Axle-Back Exhaust (Charger 6.4 application): Best Balanced Daily Driver
Roush built its name on Mustang performance, and its axle-back tuning philosophy carries over nicely to owners who want their Scat Pack to sound clearly better without becoming a nuisance. This system deepens and enriches the 392’s voice, adding presence under throttle while keeping idle and cruise volumes reasonable enough that your passengers and neighbors stay happy. The 304 stainless mufflers and matched hangers make for a tidy bolt-on swap onto the stock mid-pipe.
The honest limitation is ambition. Because it is an axle-back that retains the factory mid-pipe, the gains in flow and volume are modest next to the big 3.0 inch cat-backs higher on this list, so anyone chasing a thunderous race note will find it too reserved. But that restraint is the entire point. For a driver who wants a smarter, deeper Scat Pack that still behaves on a long road trip, this is among the most livable upgrades you can make.
- Tuned for a deeper note without overwhelming cabin volume
- 304 stainless mufflers with hangers matched to factory mounts
- No-cut axle-back design for a straightforward install
Pros: Noticeably better tone while staying daily-driver civil; Clean polished tips that suit the Charger's rear styling; Easy bolt-on swap onto the factory mid-pipe
Cons: Less dramatic than the loud full cat-back systems; Smaller power and flow gains than a 3.0 inch cat-back
Frequently Asked Questions
Will an aftermarket exhaust add horsepower to my Scat Pack Charger?
A cat-back or axle-back exhaust alone typically adds modest gains, usually a handful of horsepower and a little extra torque, because the 392 already breathes fairly well from the factory. The bigger improvements come from a freer-flowing system paired with a tune, a high-flow intake or long-tube headers. What you will definitely notice from any of these systems is sharper throttle response and a dramatically more aggressive sound, which is the main reason most Scat Pack owners install one in the first place.
What is the difference between a cat-back and an axle-back exhaust?
A cat-back replaces everything from the catalytic converters back, including the mid-pipe and mufflers, so it offers the most flow, the biggest sound change and a slightly larger power gain. An axle-back only replaces the section behind the rear axle, reusing your factory mid-pipe, which makes it cheaper, faster to install and fully reversible. If you want maximum performance and volume go cat-back, but if you want the easiest weekend install with a big sound improvement, an axle-back like the Borla or Roush option is plenty.
Will a louder exhaust cause annoying drone inside the cabin?
Drone is the constant resonating frequency you hear at steady cruising RPM, and it varies a lot by design. Chambered systems like Flowmaster tend to drone more, while technology like Corsa’s Reflective Sound Cancellation is specifically engineered to eliminate it, which is why the Corsa Xtreme is our pick for drone-free sound. If you spend a lot of time on the highway, prioritize a drone-canceling design or a resonated system, otherwise a long road trip can get tiring fast.
Do these exhaust systems fit all Scat Pack Charger years?
Most of these systems are designed for the 2015 to 2023 Charger Scat Pack with the 6.4L 392 HEMI, and many also fit earlier 2011 to 2014 models, but tip placement and bumper cutouts changed slightly across the generation. Always confirm the exact part number against your specific model year before buying, since a kit built for one body style may sit differently on another. The fitment notes on each Amazon listing will tell you which years and trims a given system is verified for.
Will installing an aftermarket exhaust void my factory warranty?
Under the Magnuson-Moss Warranty Act, simply installing an exhaust cannot automatically void your entire factory warranty. A dealer would have to prove that the exhaust directly caused a specific failure to deny that particular claim, and a bolt-on cat-back or axle-back rarely does. That said, keep your original parts, choose a reputable brand with clean documentation, and be aware that emissions-related modifications can carry separate legal and warranty considerations depending on where you live.
Our Verdict
For the definitive Scat Pack 392 upgrade, the Borla S-Type cat-back is our top pick. It nails the iconic muscle tone, uses premium T-304 stainless, bolts on cleanly and backs it all with a million-mile warranty, making it the system every other kit gets measured against. If your daily commute includes long highway miles and you cannot stand cruise drone, the Corsa Performance Xtreme is the runner up, delivering a brutally aggressive note under throttle that vanishes to near silence at a steady 70 mph thanks to its Reflective Sound Cancellation technology. Either choice transforms how the 6.4L HEMI sounds and feels behind the wheel.
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