Together with other aerodynamic elements, that spoiler helps the Senna GTR generate up to 2,200 pounds at 155 mph, keeping the car planted to the tracks as it whips around twisty turns and hurtles down long straights. Then there’s that humongous rear wing, easily the hypercar’s most distinguishable feature. It is built around the same 4.0-litre twin-turbocharged V8 that powers the road-going version, but now, it’s been tweaked to produce 814-hp, up from 789-hp. Still, this wasn’t enough for the lads at the Woking Plant, where the cars are assembled, so they came up with an even more hardcore variant-the Senna GTR. The McLaren Senna is about as extreme as it gets in terms of hypercar performance. Track-Only Monster #10: McLaren Senna GTR Image Source: DuPont Registry. The list focuses on cars that exist in production form, and that’s why automotive engineering marvels like the Bugatti Bolide and Aston Martin Valkyrie AMR Pro are not featured. Here, we shine the spotlight on some of the extreme track-only machines that have emerged over the years. They are primarily produced in very limited quantities, and it’s not unusual for them to be sold on an invite-only basis. Track-only cars also serve as valuable testbeds for new technology that may eventually find their way into their road-going counterparts. They are not bound by most of the rules that govern the development of road-going cars, and automakers have the freedom to exploit their engineering expertise. That is where track-only cars come in handy. Countless regulatory guidelines and restrictions must be adhered to, and it can create a big headache for carmakers seeking to squeeze the last ounce of performance from their vehicles. Sports car manufacturers can only go so far when tweaking the performance of their street-legal vehicles.
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