Attach the name “Cosworth” to just about anything and it instantly becomes awesome. Ford Escort? No, thanks. Ford Escort Cosworth? Yes please! Mercedes 190E? I guess. Mercedes 190E 16V Cosworth? Hot damn! So, when you take a few words that already elicit an overwhelmingly positive response, like “Impreza WRX STI” and throw “Cosworth” into the mix things start to get out of hand. The soles of your shoes have worn down where they meet the pedals, you haven’t showered in three days, your boss calls and wonders if you still work for him – it could be nasty.
Have no fear, North American car enthusiasts, none of the 75 new Subaru Impreza WRX STI Cosworth CS400s built are headed stateside! All CS400s are to be right-hand drive and are only headed for the grey, moody shores of the United Kingdom. We don’t have to worry about upsetting our backs with repeat sub 3.7 second 0-to-60 jaunts. We don’t have to worry about forgetting our girlfriend’s at DSW. Leave that business to the Red Coats. We’re going to be safe from this beast of a car, just like all those other big foreign meanies that came before it!
Cosworth took the standard STI and give it a bit of a tweak, it’s what they do when they aren’t building F1 motors. The CS400 features stronger pistons and connecting rods, modified head gaskets, a higher pressure oil pump, a different exhaust system, Cossie bearings, a new wastegate actuator and compressor on the turbo, and a reworked ECU map. This all adds up to 395 hp and 398 lb-ft of torque. The U.S market STI puts out 305 hp and 290 lb-ft of torque, comparatively.
Suspension modifications aren’t entirely clear at this point beyond the car riding 10mm lower. Autocar reports that Cosworth sourced suspension bits from both Bilstein and Eibach and that the upgraded brakes on the CS400 come care of AP Racing.
As stated above, only 75 Subaru Impreza WRX STI Cosworth CS400s will be built and all of them are headed to the U.K. The CS400 is available in dark gray (matte black), red, or silver. The car’s price is a bit staggering at 49,995 British Pounds, which exchanges to roughly $72,000 U.S.