Caliber's R/T trim features 18-inch alloy wheels, sport-tuned suspension and steering rack. Options include leather seats and 18-inch chrome-plated wheels. The performance-oriented SRT4 trim adds a high-output turbocharged engine, a unique hood with an aggressive-looking (and functional) air scoop, 19-inch wheels, sport seating, a lowered suspension, and upgraded brakes with vented front rotors. Options on the SRT4 include a display that shows performance metrics like braking distance and 0-60-mph acceleration times.