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2021 Subaru WRX STI to pack 400 horsepower?

The next-generation Subaru WRX STI may boast as much as 400 horsepower from a re-tuned, 2.4L turbocharged boxer engine, making it the most powerful factory STI ever to be offered in America.  Forbes reports that an upgraded version of the engine currently offered in the three-row Subaru Ascent crossover will power the new model, rather than the 2.0-liter unit that powers the current WRX or the 2.5L found in the current STI.   According to the report, which cites an unnamed source close to Subaru, the company's engineers are hard at work beefing up the FA24 turbocharged boxer to coax 400 horses and 361 pound-feet of torque from an engine that currently offers just 260 horsepower and 277 lb-ft of torque in family-hauling tune.  While Subaru has been building high-output WRX and STI models for its home market for decades, this would be the first time a 400-horsepower STI would be offered for sale in the U.S. In fact, it would become the most powerful Subaru sold here, period. That honor currently belongs to the 341-horsepower 2019 STI S209, which is incredibly rare (and correspondingly expensive). It followed closely on the heels of the STI Type RA, which was similarly difficult to obtain, but not nearly as powerful or expensive.  Limited (as its name suggests) to just 209 units, the S209 was offered for only one model year at an eye-watering MSRP of $64,880. Customers are still taking delivery of their cars, as STI's tuning shop can only crank out a small handful per day. If it seems like Subaru has been taking its sweet time introducing a new WRX and STI, that's because development of the hotter models diverged from that of the base Impreza prior to the launch of the latter's latest generation. Subaru considers them independent models, and while they still share platform commonalities, they are no longer treated as a single product line. Current models are still loosely based on the last-generation Impreza, and the best hint we have as to the future of the WRX and STI is the Viziv Performance STI concept, which debuted at the Tokyo Auto Salon back in 2018. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Is the Subaru BRZ STI being teased really only a tS version?

Teaser images of a purported Subaru BRZ STI were uncovered last night and sent the internet into a collective state of hysterics. That's not hugely surprising, though, considering the reverence that the BRZ, along with its fraternal twins, the Scion FR-S and Toyota GT86, have garnered from the automotive media. The sole sticking point, really, has been its mere 200 horsepower. People have been chomping at the bit over a higher output version of the sublime rear driver.
Those same people may be in for a disappointment, though. See, the BRZ STI that was teased last night might not be a real STI. Instead, it's looking like it might be a BRZ tS. According to 7Tune.com, the timing of the photos posted on Subaru's website lined up with Subaru's 86 Festival at Fuji Speedway, where the Subaru BRZ tS debuted. Despite wearing STI badges, the tS isn't the full-tilt STI model we've been hoping for. Instead, you can think of the relationship between tS models and STI models as sort of like the difference between a BMW 3 Series M Sport and a BMW M3.
Certainly, the speccing of the tS supports that idea. The engine of the BRZ remains untouched in both tS models, which is one of the primary things we expect a full-bore STI to address. A number of interior and exterior styling items have been added, along with Bilstein suspension pieces and six-pot Brembo brakes. The tS sports two different trim levels, with the higher end using Recaro seats, black alloy wheels, and a carbon-fiber rear spoiler. The base tS features silver wheels, standard seats, and all the same suspension and brake upgrades. Adding fuel to the fire that these are not the true STI models is the limited production run - Subaru will only build 750 tS cars.

Subaru WRX STI S209 brings wider body, 341 hp, gold wheels to Detroit

With the Subaru WRX STI S209, "S" finally comes to the United States. Subaru Tecnica International created the S201 in 2000, but this ninth take on the theme — inspired by the class-winning WRX STI Nurburgring Challenge racer — is the first to make it our way. Unlike the last special edition we got here, the Type RA, this one comes with a notable power boost: 341 horsepower instead of the 310 ponies in the regular WRX STI. The muscle comes courtesy of a larger compressor and turbine in the HKS turbocharger, and 1.8 pounds more boost pressure. Since the S209 is the most powerful in-house model STI has ever built, the tuning arm didn't stop there. The EJ25 boxer gets air from a new intake duct, induction box with conical air filter, and a silicone turbo inlet duct. Paddles on the steering wheel control a system that sprays water on the intercooler to reduce air temperature, a feature last seen on the WRX STI from the 2004 to 2007 model years. An old-fashioned six-speed manual controls the transmission.The engine gets its fuel from a high-flow fuel pump that feeds larger injectors. Torque hasn't changed from 290 pound-feet, but there's 10 percent more torque at 3,600 rpm. Airflow through the mufflers is 17 percent freer. The cans also are 4.1 pounds lighter and terminate in four-inch pipes. Subaru makes no mention of any other S209 weight loss, but the looks and the "focus on high-performance driving" should make themselves known. STI widened the front and rear track by 0.6 inches, and punched out fenders with aero-aiding canards make the car 1.7 inches wider. The roof and rear wing are made of carbon fiber. Instead of the 245/35 R19 wheels on the series WRX STI, the S209's forged BBS alloys wear 265/35 Dunlop GT600A summer tires, which we're told can handle max lateral grip beyond 1 G. Behind those wheels, six-piston monoblock Brembo calipers with high-friction pads clamp cross-drilled steel rotors in front, two-piston monoblock calipers in back. Stiffer coil springs wrap retuned Bilstein dampers, the suspension aided in its work by reinforced front crossmember and rear subframe, a longitudinally-flexible strut tower bar in front, flexible draw stiffeners front and back, and a 20-millimeter rear stabilizer bar. STI programmers recalibrated the SI-Drive system's three driving modes: Intelligent, Sport, and Sport Sharp.