Impreza expands its sporty WRX roster for 2006, and all versions of Subaru's smallest cars get freshened styling and more standard safety features. Impreza offers sedans, wagons, and an SUV-flavored wagon called the Outback Sport. Each has all-wheel drive, antilock 4-wheel disc brakes, and a horizontally opposed 4-cylinder engine. For '06, base-level sedans and wagons are renamed 2.5i from 2.5 RS. Like the Outback, they have 173 hp, a gain of 10. WRX models gain a base WRX TR sedan and a top-line Limited sedan and wagon. These retain turbo power, but replace a 217-hp 2.0-liter engine with a 230-hp 2.5. The WRX STI sedan returns with 300 hp. Manual transmission is standard. Automatic transmission is available for 2.5i, Outback, and WRX Limited models. WRXs exchange 16-inch wheels for standard 17s for '06; the STI retains 17s. WRXs have a sport suspension, uprated brakes, functional hood scoop, and special seats and trim. The STI has further uprated suspension, brakes, and steering. Front side airbags providing head and torso protection are standard on all Imprezas for '06 vs. just WRX and STI previously. All get a revised nose and taillamps. WRX Limiteds are the only Imprezas with leather upholstery.