The Camaro is available in four trims: LS, LT, SS and ZL1. The LS and LT are powered by a 323-hp direct-injected 3.6-liter V6 with a six-speed manual or an optional six-speed automatic transmission. The SS's 6.2-liter V8 generates 426 horsepower with the standard six-speed manual, and 400 horsepower with the optional six-speed automatic with sequential shift control. The heart of the ZL1 is a supercharged 6.2-liter engine is SAE-rated at 580 horsepower and 556 lb.-ft. of torque. Standard equipment on all Camaros includes independent rear suspension, StabiliTrak stability control with traction control, six airbags, air conditioning, OnStar and SiriusXM satellite radio. The LT adds fog lights, 18-inch alloy wheels and power seats, while the SS features unique front fascia, sport suspension, Brembo brakes, and a limited slip differential. The ZR1's standard magnetic fluid-filled shock absorbers react instantly to road conditions and driver inputs, and Performance Traction Management, the launch control feature (manual transmission only), automatically modulates engine torque for the best-possible acceleration without excessive wheel spin. The ZL1 also features a rear-differential cooler, electric power steering, an integrated engine- and transmission-oil cooler, leather seating surfaces with suede microfiber inserts, distinctive front fascia and hood with air extractors, unique 20-inch forged aluminum wheels and rear-park assist with a rear-view camera display. The available RS Package includes 20-inch aluminum wheels with performance tires and distinctive high-intensity headlights with a "halo ring" display. Optional equipment includes Bluetooth wireless connectivity, power sunroof, performance tires, Boston Acoustics sound system and a variety of exterior stripe packages. For 2012, the revised 3.6-liter V6's horsepower is bumped from 312 to 323. The new FE4 suspension debuts as a performance improvement for the SS coupe, focusing on more refined handling. The taillamps that had been a part of the RS appearance package in 2011 and a rear spoiler are now standard on all trims. A new Rear Vision Package adds a rearview camera system and an auto-dimming mirror to the existing Rear Park Assist feature. Interior updates include a revised instrument panel appearance, with new instrument graphics and trim, as well as a new steering wheel design and a power lift feature for the front passenger seat. The big news for 2012 is the debut of the ZL1 trim, the highest-performing and the most technically advanced Camaro ever produced.