Certainly GM has been building Halo cars since the 1960's or earlier, as have other brands. When you hear of the legendary performance cars of the 1960s they were Halo variants distributed to certain dealers that went right to race teams. A 426 Hemi Roadrunner was not actually that quick. And a Camaro SS 396 wasn't as quick as today's Chevrolet Bolt EV... In the 1/4 mile. Both run about a 15.0 seconds, but the Camaro required tuning and tires to get there.
GM still does the Halo cars, except that with Chevrolet, unlike Lexus and most others, they are expected to win production races just like in the past. And like Porsche and Ferrari, have built some "I know it has a license plate, but trust me, keep it off the street, or you'll be unhappy with it." cars.
Chevrolet even builds some No-VIN cars. You order them out of the Performance Parts Center. This is factory built car you order over the GM parts counter. While it runs in the same NHRA class as the Demon would, Dodge would be bringing a knife to gunfight:
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GM also has perhaps the most extensive catalog of aftermarket racing parts of any brand. Most companies want you to avoid modifications. GM has a free on-line manual on how to squeeze 850 reliable horsepower out of their 4 cylinder engine, and it's very detailed, down to shim heights, and block modifications.
A little different animal.