So the company created the BTR-XL 600, shorthand for Bi-Turbo Racer — Extra Large with 600 Horsepower.
With upgraded VGT turbochargers and other engine mods, SpeedART squeezes 600 hp and 590 lb-ft of torque from the Porsche flat-six. That's good enough to propel this open-air rocket from rest to 60 mph in less than 3.4 seconds. Velocity peaks at 202 mph.
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