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A twin-turbo C6 Corvette makes its power in a wave rather than a switch, and this build was putting that character to use on both the street and the track. Turbo C6s range from mild 700-horsepower street cars to record-setting builds past 1,300 horsepower, but the real work happens in the brakes, suspension, and cooling that keep the car composed lap after lap. Read on to find out what separates a fast turbo Vette from one that survives a full day at the circuit.
The 1987 Buick Grand National made 245 horsepower and 355 lb-ft of torque from an intercooled, turbocharged 3.8-liter V6, with peak torque arriving at just 2,000 rpm. The intercooler that arrived for 1986 is the single component separating these cars from the largely forgettable 1984 and 1985 versions. Roughly 20,193 were built in the final model year, and the famous Lamborghini comparison actually belongs to the 547-car GNX. Read on for what to verify before buying one.