When it comes to driving, Smeelen says you can run out of road with his '06 in a hurry. "John Edwards of Dream Machines testdrove it. He was only in Fifth gear...going 255 kph [about 158 mph], and he said, 'I'm just not even close to top speed.'"

And, like other LS-engined screamers, this C6 is an efficient cruiser, too. "I can putt along at 110-120 kph and get 10 liters per 100 kilometers," says Smeelen. (That's around 23 mpg at 68-74 mph.) "But if you want to boot it, I've seen it go up to 25 liters per 100 kilometers." (You don't want to know.)

Whenever Smeelen takes the car out, it's an attention getter. But he says that attention-magnet status comes with a price: "If you've ever been in Corvettes or exotic cars, have you ever noticed that people look and gawk at you while they're driving? They're not paying attention while they're driving—and they're almost running into you!"

Fortunately the heightened interest hasn't resulted in any on-road mishaps, and John Smeelen is still enjoying the many facets of this, the ultimate dual-use C6.

Spec Sheet: '06 Convertible
Owner John Smeelen; Ajax, Ontario, Canada
Block GM/Katech LS7 cast aluminum
Displacement 427 ci
Heads Airflow Research 225cc aluminum
Valves Titanium with hollow stems
Camshaft Comp Cams hydraulic (234/242-deg duration, 114-deg LSA)
Rocker Arms Yella Terra 1.7-ratio
Pistons Callies Compstar forged aluminum
Crankshaft Callies Magnum XL forged steel
Rods Callies I-beam forged aluminum
Power Adder Modified Magnuson MagnaCharger 2300 TVS with custom beltdrive and boost-sensitive alcohol injection
Boost 13 psi (17.5 psi max)
Intake Manifold Magnuson cast aluminum with integral liquid-to-air intercooler
Fuel Injectors Mototron 60-lb/hr
Fuel Pumps Two electric pumps mounted in fuel tank (one boost sensitive)
Ignition MSD coil-on-plug with custom DML "Hydro Pole" brackets
Exhaust System Modified Corsa stainless steel with custom stainless tips
Transaxle GM 6L80E automatic, modified by RPM Transmissions with "1,000-hp" upgrade halfshafts from the Driveshaft Shop
Torque Converter Precision Industries multiple-disc, Fast Times safety bellhousing
Driveshaft The Driveshaft Shop "1,000hp" upgrade
Suspension Stock with Pfadt Race Engineering coilovers
Brakes Baer discs with 14-in drilled/slotted rotors and six-piston calipers
Wheels MHT Paragon forged aluminum; 20x9-in (front), 20x12-in (rear)
Tires Michelin Pilot PS2; 285/25ZR20 (front), 335/30ZR20 (rear)
Fuel Octane 93
Miles Driven Daily 30-50