Performance Package 450HP builds on Performance Package 350HP, introducing a larger turbo, upgraded fuel system, and improved boost control to support higher horsepower and increased torque. Perfect for street-driven high-performance STIs that see occasional track use.

• Faster spool, stronger mid-range torque
• Optimized fueling for increased power levels
• More aggressive, track-ready performance

• Cobb Accessport V3 – Essential for ECU tuning, real-time monitoring, and data logging
• Cobb Intake with Airbox – Improves airflow, throttle response, and induction sound
• Invidia Catted Downpipe – Reduces exhaust backpressure for better turbo efficiency
• Blouch Dominator 1.5G2-R Turbo – Fast-spooling, responsive turbo with strong low-end power
• Injector Dynamics 1050x Injectors – Increased fuel capacity for high-boost applications
• AEM 340 LPH Fuel Pump – Ensures consistent fuel delivery under load
• Cobb 3-Port Boost Control Solenoid – Provides precise boost control and improved response
• IAG Fuel Rails/Lines Kit or Cobb FPR Kit – Enhances fuel pressure stability and distribution
• Turbo Inlet Pipe (Cobb 2.4" or Killer B 3") – Reduces restrictions, improving airflow to the turbo
• Full Turbo-Back Exhaust – Helps reduce backpressure, improves turbo efficiency, and enhances sound
• Pre-Dyno Inspection – Comprehensive check to ensure vehicle is mechanically sound before tuning
• Baseline Dyno Run – Establishes pre-upgrade power levels for comparison
• Post-Upgrade Dyno Run – Verifies power gains and ensures optimal tuning calibration

• 91 Octane required (E85 available with additional fueling modifications)
• Custom tuning required
• Pre-dyno inspection is mandatory
• Oil pan upgrade recommended
• Recommended: EJ Type RA Block or Greater for increased durability at higher power levels