The 2013 Ford Mustang retained many of its features from the 2012 model year, while making slight improvements in certain areas of design. Still in the Mustang lineup is the 305 HP V6 with 280 lb-ft of torque V6 option, both in standard and premium trims, as well as both a convertible and coupe. The high performance V6 achieves a 31 MPG highway rating for the automatic transmission equipped V6 and 19 MPG city/21 highway for the manual. Also included is the now standard high flow dual exhaust. The legendary 5.0L V8 is still the main powerplant of the GT with 420 HP, 390 lb-ft of torque. That's 8 horsepower more than the 2012 model GT, but still retains a compression ratio of 11:1. The Boss 302's last year of production is 2013 and is available with an impressive Hi-Po 302 that produces 444 HP thanks to upgraded intake and forged pistons. The Boss includes hi lift cams, oil cooler and adjustable rear shocks for optimum performance. The Boss 302 is also available in the Laguna Seca edition, with custom interior, deleted rear seat – along with an upgraded motor, suspension, and braking system. The most powerful Pony, the Shelby GT 500, has a whopping 550 HP thanks to a 5.4L 32V V8 pushing 510 lb-ft. of torque. All 2013 Mustangs, like in 2012, feature twin independent variable cam timing (Ti-VCT) technology to achieve a higher MPG rating. V6 models sport an aluminum block, while V8 models also received aluminum heads. All 2013 Mustangs still come with factory cold air induction for higher horsepower ratings and better combustion. The 2013 Shelby GT500 produces a whopping 662 horsepower at 6,500 RPM from its 5.8L supercharged V8, over 100 more horses over the 2012 Shelby GT500.