Fans of big muscle SUVs will want to check out Chevy’s just-announced Suburban RST Performance Package.  Available later this summer, the package adds a 420-hp 6.2L V-8 engine, Magnetic Ride Control with performance calibration and a new Hydra-Matic 10-speed automatic transmission. The RST Performance Package debuted on the Tahoe RST last spring, and quickly became the Tahoe’s most popular model. Chevy hopes this blend of performance, handling and ride comfort will hold equal appeal to fans of their biggest SUV. Additional performance upgrades available for the Suburban RST include a custom tuned Borla Performance Dual-Side Exit exhaust system as well as a Brembo performance brake package.