This 2015 Dodge Charger SRT Hellcat runs long-tube headers, a smaller supercharger pulley, a cold air intake, and a fresh dyno tune to push factory output from 707 horsepower to a dyno-verified 730 rear-wheel horsepower. On this run, it reached 190 mph and, according to the driver and a commenter riding alongside on a sport bike, still had more to give before running out of road. One viewer jokes about the fuel economy; nobody argues with the pull. Watch to see how close a bolt-on Hellcat gets to its real ceiling.
A 707-horsepower Dodge Charger Hellcat is supposedly already a finished product straight from the factory. The car in this video says otherwise. Fitted with long-tube headers, a smaller supercharger pulley, a bigger cold air intake, and a fresh dyno tune, this particular sedan puts down 730 rear-wheel horsepower and 708 lb-ft of torque – and it still hadn’t run out of pull when the driver ran out of road at 190 mph. One commenter, riding alongside on a literal sport bike, backs up the claim that the car had more to give. How much more is the real question nobody got to answer.
The Mods Behind the Extra Horsepower
According to the video’s own description, this Hellcat’s power gains come from American Racing long-tube headers with the catalytic converters removed, a 2.85-inch supercharger pulley to spin the blower faster than the factory unit, an aFe cold air intake, a new driveshaft to handle the added torque, and a custom dyno tune to bring it all together. That combination pushed the car from its factory-rated 707 horsepower to a dyno-verified 730 rear-wheel horsepower and 708 lb-ft of torque – gains that, on a supercharged engine, come almost entirely from feeding the blower more air and spinning it harder rather than any internal engine work. None of those individual modifications is exotic or expensive by muscle car standards, which is part of why this specific combination shows up repeatedly across other Hellcat build threads chasing similar numbers.
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Why a Four-Door Sedan Chasing 190 MPH Still Feels Unusual
Even a decade after the Hellcat’s debut, the idea of a full-size four-door family sedan running toward 190 mph off a public road still catches viewers off guard, and the comments here lean into exactly that disbelief – multiple people specifically point out that this is, in one commenter’s words, “a big ol’ nasty sedan,” not a two-door sports car, doing numbers that would have been remarkable for a dedicated supercar a generation earlier. That mismatch between the car’s mundane four-door shape and its actual capability is a big part of why this specific upload has held onto nearly 81,000 views years after most bolt-on build videos fade into obscurity.
Running Out of Road, Not Out of Power
The description states plainly that the car had more speed available but simply ran out of usable road to reach it, a claim the comments back up repeatedly – several viewers note the car was visibly still accelerating hard when the driver had to back off, with one guessing it could have reached 205 mph given a longer stretch. That’s a common limitation in real-world top speed runs: the car’s actual capability often exceeds what any given road can safely accommodate, which turns videos like this one into a demonstration of available road length as much as available horsepower. Finding a stretch of public road long enough, straight enough, and legally accessible to attempt a genuine 190-mph pull is its own logistical challenge separate from the car itself, one that likely shaped exactly where and when this run could happen at all.
The Motorcycle That Couldn’t Shake It
One commenter describes racing this exact Hellcat on a Kawasaki ZX-10 sport bike and says the car was “still pulling” on him, high praise given that a stock ZX-10 can out-accelerate nearly every production car through the quarter mile. A modified Hellcat holding its own against a literbike at speed says more about this build’s real-world output than a dyno number alone, since it reflects sustained pull at speeds where aerodynamic drag is working hard against both vehicles.
The Transmission Doing Quiet Work in the Background
A closing comment notes the car “still had 8th gear” left as it approached its top speed, a reference to the Hellcat’s ZF-sourced eight-speed automatic, which is tuned specifically to keep the supercharged 6.2-liter Hemi in its powerband through a long series of gear ratios rather than relying on a shorter transmission that would run out of ratios well before triple-digit speeds. Having a gear in reserve at 190 mph is part of why more than one commenter believed the car had additional speed left to give.
The ‘2 MPG’ Joke That Won’t Go Away
Several commenters can’t resist joking about fuel economy during a run like this, with more than one guessing the car was burning through roughly 2 miles per gallon at full throttle – an exaggeration, but not by an outrageous margin, since a supercharged 6.2-liter V8 running wide open at nearly triple-digit speeds consumes fuel at a rate that has little in common with the same engine’s official highway rating. It’s the kind of joke that shows up in the comments of nearly every high-speed Hellcat video, precisely because the contrast between the car’s everyday practicality and its top-end behavior is part of the appeal. Real-world fuel consumption at wide-open throttle on a supercharged engine like this one can genuinely dip into single-digit territory, which is closer to the joking estimate than most casual viewers probably assume.
What This Build Says About the Hellcat Platform
What stands out about this particular run isn’t just the top speed – it’s how bolt-on the modifications actually were. Headers, a pulley, an intake, and a tune are well within reach of a home-garage build, not a full engine teardown, and the result was still a 23-horsepower gain over factory rating and a genuine 190-mph run on a public road. That accessibility is a big part of why the Hellcat platform built such a devoted aftermarket following almost immediately after its 2015 launch – the factory car was already fast, and it turned out to respond well to relatively simple upgrades.
A Run That Ended Early, On Purpose
By every account in the video and its comments, this Hellcat didn’t hit a wall at 190 mph – it hit the end of a road. That distinction matters for how the run should be read: not as a ceiling on what this particular build could do, but as a snapshot of how much performance a handful of accessible bolt-on parts unlocked from an already formidable factory platform, with the real number still sitting somewhere just out of frame. Until someone finds a longer stretch of road and films it, the true ceiling on this specific combination of headers, pulley, intake, and tune remains exactly what the comments guess it to be – somewhere north of 200.
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Makes sense, charger is more aerodynamic
That car absolutely JUMPED from 90 to about 130. Wow! 190 is ridiculously fast. I cannot imagine traveling at that velocity on a public street in a production car. It’s amazing and disturbing all at the same time.
Fake
its a dodge, so its goin to be fast,,,