Among the big three, range-topping American pony cars, the Chevrolet Camaro ZL1 is the least powerful and the slowest in a straight line. Yes, even though this 650-horsepower supercharged V8 coupe can reach 60 mph in 3.5 seconds, both the Ford Mustang Shelby GT500 and Dodge Challenger SRT Super Stock are more powerful and quicker.

Admittedly, we're talking tenths of a second here in some cases, but the Chevy can't claim ultimate bragging rights. That could change because a new rumor has emerged that the ZL1 could be receiving some high-performance upgrades from the Cadillac CT5-V Blackwing.

The ZL1's 6.2-liter supercharged LT4 V8 is hardly what you'd call underpowered with its 650 lb-ft of torque, but the Caddy is even more powerful. The CT5-V Blackwing produces 668 hp and 659 lb-ft and can reach 60 mph in 3.7 seconds. It also rides on the same Alpha platform as the Camaro and comes with extras like Brembo carbon-ceramic brake rotors and a Magnetic Ride Control suspension. According to a source from inside General Motors, these are some of the features that could make it onto the ZL1 for the last two model years that it'll be on sale. And we'd expect these changes to also apply to the ZL1 1LE.

A few days ago, a Camaro prototype was spotted in transit and it certainly looked like a high-performance version. It sported a massive rear wing and wheels that are shared with the ZL1 1LE. Of course, the ultimate incarnation of the current Camaro would no doubt be the return of the Z28 with a flat-plane crank V8 from Corvette, but this is unlikely to transpire. The Camaro's future remains in doubt, but we've heard an all-electric model could follow the existing generation. Before a possible electric Camaro, it'll be interesting to see if the latest rumor is true, but a Camaro ZL1 with Blackwing upgrades sounds like a perfect way for GM to see out the current car with a bang.