When it comes to rare Corvettes, a genuine Twin-Turbo C4 has to be among the most special of the family.
Only 125 cars were made in 1988, but the Callaway Twin-Turbo C4 was not just rare, it was one of the craziest cars you could buy in the ’80s.
This specific one is number #12 of the production run and is mostly stock, featuring Callaway-approved upgrades that include a “Wonderbar” intake mod, new camshaft, larger injectors and fuel pump as well as a conversion to run on E85, among others.
The results are pretty impressive as the car now produces 476hp and 607lb-ft at the wheels, making it a true rocketship, even by today’s standards. And because this is GM in the 1980s, the transmission is that weird, electronically controlled four-plus-three manual with overdrive.
What’s even greater is that Callaway still supports these cars, offering everything from new parts to upgrades such as the ones listed above.
With the V8 producing peak horsepower at just 4,500rpm and offering huge torque from low down, it’s needless to say that the Callaway Corvette is a rather unique driving experience. The powerband might be a bit diesel-like but there’s so much grunt that you couldn’t care less.
Matt Farah tries to tame the beast on his latest One Take video linked below.