Based out of Old Lyme, Connecticut, Callaway Cars has been making high-performance GM vehicles and parts for nearly 50 years, and now, the specialist is turning up the wick for refreshed Chevy Silverado 1500 and refreshed GMC Sierra 1500 pickup trucks equipped with the 5.3L V8 L84 gasoline engine thanks to this new SC520 Package.
The main party piece is the Gen Three TVS R2650 Supercharger System with associated TripleCooled Intercooling. Callaway says that this blower incorporates an internal bypass mechanism that works to divert airflow under low-load, and thus, enables the supercharged engine to return “practically unchanged” fuel economy figures compared to the naturally aspirated configuration.
Output, however, is up considerably, rising to 520 horsepower at 5,600 rpm and 490 pound-feet of torque at 4,600 rpm, as compared to stock performance of 355 horsepower at 5,600 rpm and 383 pound-feet of torque at 4,100 rpm.
Complimentary upgrades include a low-restriction stainless-steel exhaust system with dual outlets and quad tips, as well as a high-flow intake, while Callaway’s bespoke CalCal engine calibration keeps it all 50-state emissions legal. The package also comes with aesthetic upgrades like aluminum door sills, key medallions, chrome exterior badging, and authentication plaques. Optional upgrades include 20-inch Callaway wheels, billet pedals, black exhaust tips, and black badging. Critically, the package is covered by a 3-year / 36,000-mile limited warranty, while a 5-year / 60,000-mile powertrain service contract is also offered.
As GM Authority covered previously, Callaway Cars is also offering the SC602 package for refreshed Chevy Silverado and refreshed GMC Sierra models equipped with the 6.2L V8 L87. Pricing for the new option packages starts at $24,995.