Although the rest of the Impreza lineup was totally redesigned for greater fuel efficiency, more room and an updated style, the WRX STi remains unchanged for 2012. Subaru did, however, update the WRX STi for 2011 with the addition of a widely welcomed sedan flavor to complement the hatchback. More than a few drivers have praised and then brushed off the WRX STi's 6-speaker sound system, preferring instead to focus on this rocket's rally-readiness. A good stereo is fantastic, but the rev of this baby's Boxer engine is all STi drivers care to hear. Some have even commented that the sound insulation is a little too good at sealing off the 2.5-liter 4-cylinder's turbocharged melody. The STi gets a boosted version of the Impreza WRX's engine with 305 hp and 290 lb-ft of torque and a 6-speed manual, reaching 60 mph in 4.5 seconds and rating 17 mpg city/23 highway. The only upgrade for the STi is straight to Limited, but the STi is also available in sedan and hatchback flavors. The WRX STi gets the full performance treatment with 18-inch wheels, high-performance tires, Brembo brakes, xenon headlights, front and rear limited-slip differentials, SI-Drive adjustable engine behavior, a bigger hood scoop and a thoroughly buttoned-down suspension. Inside the cabin lays in wait faux-suede and leather upholstery with heated seats. Going for the Limited means you'll also get foglights, 18-inch upgraded wheels, sunroof and full leather upholstery along with a multitude of options. The short shifter is a must-have according to drivers and reviewers alike. So when can we look forward to a roomier, more fuel-efficient and more upscale refresh for the WRX STi to match that of the new 2.0i? Nobody knows for sure—Subaru is always especially good at keeping things like this on the down low, and they've proven brand fans wrong more than once. Some pros claim 2014, but I'm betting on a refresh near the end of 2012 as a 2013 model, with the engine update to follow for 2014. No word on whether the WRX STi is rally-bound anytime soon though, so don't bet on that engine upgrade improving horsepower or torque over fuel economy.