The WRX STi spec C model features enhanced engine and chassis performance as well as a lighter body on the premise of driving in motor sports. The twin scroll turbocharger newly adopted ball bearings for the turbine axle bearing, and the ECU (Engine Control Unit) program was also exclusively tuned. Thus the engine of the spec C model increases the maximum torque, and provides quicker response and improved accelerating performance. The adoption of an aluminum engine hood, laminar window glasses and a downsized battery resulted in a lighter body, which further refines the model’s driving performance.
Enhancement of Chassis performance:
- Reinforcement of the cross member in front-suspensions offers a linear steering response.
- Rear LSD (Limited Slip Differential) system was changed to a mechanical type from a Torsen type to obtain the steady and powerful traction during cornering.
- Bridgestone “POTENZA RE070” (245/40R18) were adopted to enhance cornering ability and higher grip performance, especially in dry conditions.
- Nimble handling with a firm steering feel is assured by increasing oil flow volume in the power steering system.
Lightened body:
- An aluminum engine hood and a downsized battery, which make the front section of the vehicle lighter, produce better maneuverability.
- Laminar glasses were adopted in the front and side windows. They lightened the upper section of the body weight, resulting in improved stability during cornering.
- Newly-designed lightweight 18-inches alloy wheels are standard to offer excellent road-hugging property by reducing unsprung weight.
Others:
- A structural change of fuel pomp provides stable fuel delivery even on high-load driving.
- Gold colored “brembo” brake calipers are standard.
- The front bucket seats (fabric with red stitch) are standard on models with 18-inches alloy wheels.
- The “RECARO” seats are optional with SRS front side airbags and SRS curtain airbags on models with18-inches alloy wheels.
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