This version is even more anabolic than the tS, with more heavy duty features. The Spec C gets a bigger, stronger front suspension strut brace reinforcement and underbody chassis strengthening, while the rear gets a conventional yet beefier mechanical limited-slip differential by Torsen.
Other major changes over the normal STI include an aluminium bonnet, laminar glass for the front and side windows and a lighter battery. The interior is also stripped out leaving only the bare essentials in the aid of conserving weight.
It's basically the cream of the crop, and puts every bit of Subaru Technica International's knowledge of motorsport all into one car. If you're after the basis for a weekend racer, or even a car that's ready to race straight out of the box, then the Spec C is a surefire option - it even comes with its own puncture repair kit for the tyres. The only problem with this car is it's not officially going to go on sale in Australia.
Other technical highlights include a new ball bearing turbocharger and a re-programed engine computer to help it produce extra torque and power over the standard WRX STI. It also gets a water spray system for the intercooler so the car can run cool and perform at its best no matter how many laps you throw at it. Overall the engine produces 227kW of power and a V8-like 430Nm of torque.
The WRX STI Spec C is now on sale in Subaru dealerships throughout Japan.