Shocking Truth About the Chevy 572 – The 9.4L Beast GM Kept Off the Streets!
Have you ever heard of the Chevy 572 engine?
It’s a massive beast with a displacement of 9.4 L, nearly twice the size of a typical V8.
But here’s the catch.
You almost never see it on the street.
It’s not found in any mass-produced Camaro, Corvette, or Suburban.
So, where did it come from?
Who was it made for?
And why was it built?
This isn’t an engine for ordinary people.
572 isn’t just a number.
It’s a declaration of brute strength, an unfiltered passion for speed and horsepower.
It was built to shock, to dominate, and to roar on the track, not to idle quietly in a parking lot.
In this video, we’re going to uncover the full truth behind the Chevy 572.
From its origins and technical specs to the cars that carried it and its battle for dominance against LS and Hemi legends.
Buckle up because this monster is not for the faint of heart.
In the late 1990s and early 2000s, as the high performance car community was booming, General Motors realized something critical.
The crate engine market was completely dominated by aftermarket brands like Dart, World Products, and Edelbrook.
These companies were selling massive custom big block engines.
540, 572, even 630 cub in.
And drag racers and custom car builders were snatching them up like candy.
GM couldn’t just sit on the sidelines.
They decided to jump back into the game, not with a mildmannered engine, but with a true monster, the Chevy Z572.
Developed by GM Performance Parts, now Chevrolet Performance, the 572 was designed as a direct response to the custom engine world.
We can play this game, too, only bigger.
The 572nd wasn’t built for mass production cars.
It came preassembled, crated in wood, ready to be dropped into whatever car you dared to tame.
With brutal power, GMbacked reliability, and a price tag not meant for beginners, the 572 quickly became a legend among builders, especially those who wanted something totally overkill beyond ordinary standards.
The Chevy 572 engine doesn’t just impress with its massive size.
It’s the technical configuration that leaves gear heads breathless.
It’s a big block V8 with a displacement of 572 C in or 9.4 L based on the MarkV/ Gen 6 generation of Chevy big blocks.
GM Performance offers two main versions.
The ZZ572620 Deluxe is built for the street, producing 620 horsepower at 5,500 RPM and 650 lb feet of torque at 4500 RPM.
It runs fine on 91 octane fuel, making it ideal for pro street builds or daily driven muscle cars.
But if you want something full race and no compromise, there’s the ZZ572/720R with a 12:1 compression ratio, race fuel, and output of 720 horsepower at 6,250 RPM and 685 lb feet of torque.
It’s built for the/4 mile.
Internally, this beast features a high strength cast iron block, CNC machined aluminum heads, a high lift roller cam shaft, forged pistons, and heavyduty H-beam connecting rods.
The 620 has a 9.6:1 compression ratio, more manageable and reliable, while the 720R is more violent and aggressive.
And the sound, it’s not a subtle whine.
It’s a deep, thunderous roar that shakes the ground like a storm.
Every throttle press is a declaration of raw mechanical might.
Even if you tame it with EFI systems, its raw and wild nature always comes through with every stomp of the pedal.
And because it’s so brutally powerful, not every car is worthy or capable of housing this monster under the hood.
And that’s exactly why the Chevy 572 has never been found in any mass-roduced GM vehicle, not in the Camaro, not in the Corvette, not in any SUV or pickup that ever left the factory.
The reason is simple.
This is a crate engine sold separately, installed by choice, and built for true performance junkies.
That’s why you’ll often find the 572 in fully built classic muscle cars like the 1969 Camaro SS, Chevel, El Camino, Nova, and even old school C10 pickups.
These cars aren’t just restored, they’re reborn with performance levels far beyond stock.
Transforming them into street monsters or strip ready drag machines.
In the American custom scene, dropping in a 572 is a bold statement.
It says, “I don’t want average.
I want absolute power.”
You’ll also spot the 572 in wild builds like 30 style hot rods, custom frame projects, or even official Chevrolet performance show cars displayed at events like SEMA.
Some viral YouTube videos have shown old Malibus or Impalas blasting through the quarter mile in under 10 seconds.
All thanks to the 572.
Despite its monstrous power, the Chevy 572 never reached the popularity of the LS series.
And not because it’s worse, but because it’s simply too much.
First, there’s the price.
A ZZ572/620 crate engine can cost over $15,000, not including installation, tuning, and supporting parts.
Opt for the high-performance 720R version, and that number easily climbs past $20,000, making it a luxury only serious builders can afford.
Second, technical limitations.
The 572 is physically huge, much larger than typical LS or small block engines.
This makes fitting it into modern engine bays a challenge, and its heavy weight affects weight distribution and handling.
Third, daily drivability.
The 572 doesn’t play well with everyday fuel.
The 720R requires race gas, while the 620 version runs on 91 octane, but burns fuel at a terrifying rate and lacks the smoothness of modern engines.
In contrast, the LS family offers varants from 4.8 L to 7.0 L at lower cost, lighter weight, easier installation, and excellent compatibility with EFI, turbocharging, and electronic tuning, making it the go-to king of modern performance builds.
And this stark contrast between the 572’s raw strength and the flexibility of other engine platforms has sparked an ongoing debate among Chevy 572 LS and HMI.
Which one truly reigns supreme?
When it comes to American high-performance engines, three names ignite endless discussions.
Chevy 572, the LS series, and the legendary HMI 426.
Each represents a distinct philosophy, era, and type of power, but all command deep respect in the car world.
The Chevy 572 is the epitome of brute force.
Bigger is better, taken to the extreme.
With massive displacement, earthshaking torque, and a roar that rattles your bones, it’s the choice for uncompromising builders.
Those who don’t care about weight, fuel economy, or electronics.
They want raw horsepower.
On the other hand, the LS series represents technological evolution with smaller displacements, typically 5.3 L to 7.0 L.
These engines use lightweight materials, advanced EF systems, and modular tuning potential to make 500 to 1,000 horsepower with relative ease and affordability.
That’s why the LS has reigned as the king of custom builds for the past two decades.
Then there’s the Hemi 426, a 1960s icon steeped in Mopar mythology.
Its unique hemispherical combustion chambers give it excellent breathing at high RPMs.
However, it’s rare, expensive, and usually found in restored collector cars rather than modern performance machines.
In this three-way battle, there is no clear winner.
The 572 is untamed muscle, the LS is the tech king, and the HMI is a timeless legend.
The real question is, what kind of power are you chasing?
And within today’s custom car culture, where every engine choice reflects the builder’s identity, the 572 has carved out a reputation all its own.
In the world of American custom cars, the Chevy 572 isn’t just an option, it’s a statement.
For hardcore enthusiasts, choosing the 572 isn’t simply about adding horsepower.
It’s about declaring a no compromise mindset.
It embodies the go big or go home philosophy.
Either you go allin or you don’t go at all.
You’ll often see the 572 in wild over-the-top builds.
Pro street Camaros, dragready Chevel, race prepped El Caminos, or gritty C10 pickups with enough power to embarrass modern supercars at car meets, classic shows, or drag events.
When a 572 powered engine fires up, the crowd parts instinctively.
The sound is unmistakable.
To many veteran builders, the 572 is more than an engine.
It’s a right of passage.
If you can tame it, you’ve graduated to another level of custom performance.
But it’s precisely because of this extreme nature that the 572 has never been a mass choice engine.
It’s not efficient.
It’s not beginner friendly.
And it doesn’t forgive compromise.
And it’s those same passionate builders who in this age of advancing technology are breathing new life into an engine many assumed belonged only to the past.
Though it debuted in the early 2000s, the Chevy 572 hasn’t faded away in this modern era of EVs, hybrids, and engine downsizing.
On the contrary, it’s enjoying a quiet resurgence among elite builders and hardcore collectors.
Today, many custom shops are pairing the 572 with modern tech like EFI, programmable ignition systems, and even twin turbos, pushing output past 1,000 horsepower while preserving its raw mechanical soul.
Even more, the restood trend, restoring classic cars with modern performance, has given the 572 new life.
From Impalas and Chev to vintage C10s, builders are dropping in 572s as a statement.
This isn’t just a beautiful car.
This is a beast that’ll eat you alive if you underestimate it.
Chevrolet Performance never discontinued this engine either.
They still quietly produce the ZZ572, continue to support it with parts, and showcase it at events like SEMA as a reminder that old school muscle is far from dead.
And maybe that’s exactly why in an era where everything is getting smaller, the 572 remains a lasting symbol of unapologetic madness.
In a world increasingly optimized for convenience, where chips and algorithms control everything, the 572 feels like it’s from another planet.
A reminder that sometimes passion doesn’t need a reason.
It’s not efficient, not cheap, not smooth, but it’s raw, emotional, and unmistakable.
It’s not made for the masses, nor does it need their approval.
It exists for those who understand, who feel, and who dare to live with such primal power.
