A 1,500-HP Shelby GT500 Lines Up Against a 1,200-HP Camaro ZL1 — Ford vs. Chevy’s Oldest Muscle Car Rivalry Just Got Serious

A heavily built Shelby GT500 pushing an estimated 1,500 horsepower squares off with a 1,200-horsepower Camaro ZL1 in a straight-line showdown. Both cars started as factory monsters before their owners pushed them into a different league entirely, and the pairing revives a rivalry that dates back to 1967.

Two of the meanest factory-based muscle cars on the road just lined up against each other, and neither one is anywhere close to stock anymore. A Ford Shelby GT500 built to roughly 1,500 horsepower faces off with a Chevrolet Camaro ZL1 pushed to an estimated 1,200 horsepower, and the gap between those numbers doesn’t tell the whole story. Both cars started life as some of the most powerful vehicles their manufacturers have ever sold to the public — the GT500 with a supercharged Predator V8, the ZL1 with a supercharged LT4 — before their owners decided factory output wasn’t enough. What follows is a launch, a fight for traction, and a finish line that settles nothing about which platform is actually better, because at this level, the driver and the setup matter as much as the horsepower number.

About the Video

The video, posted by the channel Launch Kings, captures the two cars staging side by side before a straight-line pull. The GT500 in this matchup is running an estimated 1,500 horsepower through its supercharged 5.2-liter V8, while the Camaro ZL1 is built to around 1,200 horsepower on its own supercharged 6.2-liter LT4. Both numbers represent roughly double what each car made when it rolled off the assembly line, which puts this squarely in the territory of serious aftermarket builds rather than a showroom comparison. The description frames it plainly: Ford versus Chevrolet, supercharged V8 versus supercharged V8, with traction and launch technique deciding as much as raw output once the tree drops.

Getting a factory supercharged platform from the 650-760 horsepower range up into four-digit territory isn’t a bolt-on afternoon job. Builds like these typically mean a larger or upgraded supercharger pulley and housing, forged internals to survive the added cylinder pressure, upgraded fuel systems capable of feeding the extra demand, and a transmission and driveline built or reinforced to handle torque the factory parts were never designed for. Both the GT500’s dual-clutch Tremec and the ZL1’s driveline are already among the stoutest factory setups in their respective lineups, which is part of why builders gravitate toward these two specific cars when they want a factory-strong starting point instead of building up from a base model.

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What makes clips like this compelling to muscle car fans isn’t just the horsepower — it’s watching two nameplates with real factory pedigree pushed past what their engineers ever intended. Neither the GT500 nor the ZL1 needed forced induction from the factory to be taken seriously; both already came from Ford and Chevrolet with superchargers bolted on at the assembly plant. Doubling that output through aftermarket tuning is a different animal, and it’s exactly the kind of build that gives these two rivals another chapter in a fight that’s been going since the muscle car era began.

The Shelby Name That Started With a Le Mans Winner

The GT500 nameplate goes back to 1967, when Carroll Shelby — a former Army Air Corps pilot who won the 1959 24 Hours of Le Mans driving an Aston Martin before building the legendary AC Cobra — was brought in by Ford’s Lee Iacocca to turn the Mustang into something with real teeth. The first GT500 used a 428-cubic-inch, 7.0-liter V8 rated at 355 horsepower and 420 lb-ft of torque, and Shelby American built roughly 2,048 of them for the 1967 model year. Ford and Shelby parted ways at the end of 1969, which technically made that year the last of the original Shelby Mustang era before the nameplate went dormant for decades.

The GT500 name returned in 2007 on the S197-generation Mustang and stuck around for seven years before Ford brought out the version most people picture today: the S550-generation GT500 that launched for the 2020 model year. That car paired a 5.2-liter supercharged “Predator” V8 with a 2.65-liter supercharger, and Ford rated it at 760 horsepower and 625 lb-ft of torque — enough to run 0-60 mph in about 3.3 seconds and the quarter mile in roughly 10.7 seconds, sent through a seven-speed Tremec dual-clutch transmission. It was, at the time, the most powerful street-legal Ford ever built. Ford ended GT500 production in 2022 with no replacement announced, which makes every one of these cars a closed chapter — and a favorite target for builders chasing four-digit horsepower numbers, like the one in this video.

How a $4,160 Factory Option Became Chevy’s Ultimate Sleeper

The Camaro ZL1’s roots go back even further into drag strip folklore. In 1969, Chevrolet quietly offered an all-aluminum 427-cubic-inch V8 as a Central Office Production Order — COPO 9560 — that buyers could add to a Camaro for an extra $4,160, more than the price of the car itself. It existed specifically to dodge GM’s internal rule capping Camaro engines at 400 cubic inches, and it was built with drag racing in mind from the start. Chevrolet officially rated the ZL1 engine at 430 horsepower, a number widely understood to be conservative; some tuned examples were dyno-verified well north of 500 horsepower. Only 69 of those original ZL1 Camaros were built, making it one of the rarest and most sandbagged engines GM ever sold to the public.

The ZL1 name was revived for the fifth-generation Camaro in 2012 and carried forward into the sixth-generation car that ran from 2017 to 2024 — the platform the Camaro in this video is almost certainly built from. That version paired a supercharged 6.2-liter LT4 V8 with an Eaton 1.7-liter supercharger for a factory rating of 650 horsepower and 650 lb-ft of torque, backed by an electronically controlled limited-slip differential and either Magnetic Ride Control or, on 1LE-equipped cars, Multimatic’s spool-valve dampers. Like the GT500, it left the factory as one of the most track-capable muscle cars GM has ever sold — which is exactly why a builder chasing 1,200 horsepower would start here instead of somewhere with less of a foundation.

It’s worth noting how closely the two origin stories mirror each other. Both cars trace back to manufacturers looking for a technical edge over the other within the rules of the day — Shelby by hand-building a race-bred 428 for a low-volume Mustang variant, Chevrolet by quietly ordering an all-aluminum big block through a fleet paperwork loophole most Camaro buyers never even knew existed. Neither was really meant for the average customer. The GT500 was a low-production performance special from the start, and the ZL1 was buried so deep in GM’s order sheet that most dealers reportedly discouraged customers from even asking about it. That shared DNA — cars built to skirt the edge of what their companies would officially sanction — is part of why the rivalry still resonates with builders six decades later.

What Makes This Matchup Different From a Stock Comparison

Stock-for-stock, the GT500 already outguns the ZL1 by 110 horsepower straight from the factory, and that gap has fueled Mustang-versus-Camaro arguments for years. But once both cars are built to this level — roughly double their factory output — the conversation changes entirely. At 1,500 and 1,200 horsepower, neither car is putting its full power down cleanly off the line; traction becomes the deciding factor as much as the dyno sheet. A car making 300 more horsepower than its rival can still lose a race if it can’t hook up, which is exactly the tension a launch like this creates. It’s also a reminder of how far these platforms can be pushed: the same supercharged V8 architecture that left the factory rated in the 650-760 horsepower range has enough structural headroom, when properly built, to survive nearly double that output.

There’s also a psychological element that stock comparisons don’t capture. A factory GT500 owner and a factory ZL1 owner are, in a real sense, already buying into a rivalry — Ford’s most powerful production Mustang versus Chevrolet’s most track-focused Camaro trim. Once either owner starts modifying, they’re no longer just defending a factory spec sheet; they’re chasing a number that has no ceiling built in by the manufacturer. That’s a different kind of commitment than buying the faster car off the lot, and it’s part of why builds like these draw so much attention from muscle car fans who grew up watching this exact rivalry play out with far less horsepower on the table.

That’s the real throughline connecting this video back to 1967 and 1969. Both nameplates were born from manufacturers trying to squeeze every legal advantage out of a factory drag car — Shelby with a hand-built 428 V8, Chevrolet with a rule-dodging aluminum 427 sold as a stealth option most dealers didn’t even advertise. Six decades later, the fight looks different — forced induction instead of big-inch displacement, aftermarket tuners instead of factory engineers — but the underlying rivalry, and the willingness of owners to push these cars past what their manufacturers rated them for, hasn’t changed at all.

Watch the full video above and let us know your thoughts in the comments.