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By adding a supercharger system to the high-revving flat-plane crank V8 engine, Hennessey takes the Shelby Mustang to a whole new level.

Auto enthusiasts can never get enough horsepower; it's a simple statement that the folks at Hennessey Performance Engineering take to heart. Proof of this approach comes from a new YouTube video highlighting the Texas-based firm's efforts with an 850-hp Ford Shelby Mustang GT350R. A short time on the track shows just what a supercharger and other upgrades can do to an already impressive street racer.

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As presenters Alex and Adam tool around the track in the Hennessey-modified GT350R, viewers get treated to the thrilling sound of a flat-plane crank engine. There's a certain rawness that only encourages further listening—think of it as ASMR on steroids.

What's missing from the video is a deep dive into how the company turned the monster GT350R into this ferocious beast. There's a mention of a supercharger; otherwise, the particulars are missing. Performance details, such as a quarter-mile or 0-60 time, are also absent.

The positive side to this lack of specifics is you're forced to focus on watching and listening to the GT350R in all its high-revving V8 glory.

RELATED: A Detailed Look At The Ford Mustang Shelby GT350R's Voodoo V8 Engine

While missing from the video, Hennessey's improvements to the GT350R aren't a closely held secret. At the center of the package is a 3.0-liter supercharger system with seven pounds of boost. This transforms the stock 5.2-liter Voodoo V8 into a powerplant with 850 hp and 673 lb-ft of torque. That's a substantial jump from the factory specs of 527 hp and 429 lb-ft of torque.

Other parts of the recipe include upgraded swap-outs for the throttle body, fuel injectors, heat exchanger, and air induction system. Hennessey also retunes the chassis and adds a two-year warranty for good measure. In addition, the $25,000 offering provides a numbered engine bay plaque and exterior badging.

It restates the obvious that more horsepower and torque will lead to better acceleration. Instead, the issue is if the cost of the upgrade is worth improvements measured in tenths of a second. That may not matter on the street but could make a difference on the track.

Published online reports show the stock GT350R can reach 60 mph from a standstill in 3.9 seconds.

For reference, that's 0.2 seconds faster than the slightly heavier GT350. Wave the Hennessey magic wand over the GT350R, and the 0-60 time drops to 3.3 seconds.

Sources: YouTube/Hennessey Performance, hennessey.com, ford.com, fordauthority.com, caranddriver.com

Dave Goldberg is a lifelong auto enthusiast and holds a BA in Journalism from The George Washington University. While he leans towards European wheels for his personal driving, Dave gets excited about everything from Acura to Zagato.