North American tuner STaSIS has unveiled their latest upgrade program for the Audi S5 Cabriolet, dubbed the Challenge Edition. The upgrades include a 3.0-liter supercharged engine which boasts 410hp and 370 lb-ft of torque, up from 333hp and 344 lb-ft. As far as performance goes, you are looking at 0 to 60 mph in 4.3 seconds. The custom exhaust system features four stainless steel end pipes and high rpm resonators, allowing the S5 to achieve 23 percent more power than the standard version.
STaSIS has also upgraded the chassis and braking systems. Included are 20-inch ultra lightweight forged aluminum wheels covered in high performance low profile tires. Some other features include Alcon six-piston monobloc calipers with 14.5-inch front two piece floating discs and braided stainless steel brake lines.