Whatever the type of vehicle, Reeves eschews the description "tuner" as if it implies some sort of feverish boy-racer's "wings and things" restyling efforts in a backyard garage. No, this diversified, well-established company maintains that its cars and trucks are as far from tuners as stealth fighters are from toy rockets.

Taking a closer look at the specifics to justify this assertion, the Eaton Roots-style supercharger features a smaller, subdued-looking black powder-coated housing. Internally, however, it's a much more sophisticated unit than those bulky, bad-boy blowers bristling through the hoods of street rods and musclecars.

Even though the Roots type of supercharger has been around for better than a century (it initially was used to circulate air in mineshafts), Eaton's latest version is greatly advanced, with Twin Vortices Series (TVS) rotors. It's used on the ZR-1 Corvette and many other applications.

How does this new setup differ from those old Jimmy puffers? There's more twist (160 degrees) in the four-lobe rotor configuration, along with higher-flow ports, both of which enhance air-handling characteristics without increasing the overall size of the unit. In other words, it's a more compact design with less weight, yet provides greater output.

To keep up with the increased volume of airflow, Callaway engineers inserted injectors that pump out more fuel. And a patent-pending, liquid-to-air intercooler, integrated with the intake manifold base, ensures a lower temps for more air density and thus additional fuel combustion, all of which means what Callaway vehicles are best known for: power.

To handle this increased forward momentum, options on this particular package include nine-spoke alloy rims and BFGoodrich rubber, plus Le Mans GT brakes (sourced from a respected performance specialist). And all these performance goodies are covered by a standard, three year/36,000 miles limited warranty (an extended five year/100,000 mile warranty is available as well).

If either the 1500 or 2500 pickups aren't your preference, SUV versions are being delivered as well, such as on the Suburban, Tahoe, and Avalanche (which serves double duty as both a pickup and SUV, if you prefer having both configurations). The lineup offers outputs ranging from 450 to 540 hp (depending on engine displacement), with an up-charge package price starting at $17K.

Rather than selling vehicles factory direct, Callaway works closely with Chevrolet dealers as outlets (30 nationwide as of this writing, with more on the way). That approach simplifies service, and gives dealerships something extra-special to display in their showrooms. We met up with this Callaway SportTruck during a cross-country jaunt to a number of prospective dealers from the Southeast to the Northwest, through the Rockies and back to SoCal, and this well-muscled pickup handled the long-haul route without a hiccup. Not all sport trucks can make that sort of claim, but it's right keeping in with Callaway's company DNA.


2012 Callaway Silverado SC540
BASE PRICE $23,000 (regular cab, standard bed Silverado WT with the 5.3L engine option)
PRICE AS TESTED $40,000 (est)
VEHICLE LAYOUT Front engine, RWD, 4 pass, 2+2-, 4-door truck
ENGINE 6.2L/540-hp/522-lb-ft OHV 16-valve supercharged V-8
TRANSMISSION 6-speed automatic
CURB WEIGHT (F/R DIST) N/A
WHEELBASE 143.5 in
LENGTH x WIDTH x HEIGHT 230.2 x 80 x 70 in (mfr est)
0-60 MPH 5.0 sec (mfr est)
QUARTER MILE 13.4 s @ 103 mph (mfr est)
BRAKING, 60-0 MPH 121 feet (mfr est)
LATERAL ACCELERATION N/A
EPA CITY/HWY FUEL ECON N/A
CO2 EMISSIONS N/A