COBB NexGen Stage 2+ Flex Fuel Redline CF Power Package (SUB004NG2S2FF-RED) | Subaru STI 2015-2021

The COBB NexGen Stage 2+ Flex Fuel Redline CF Power Package (SUB004NG2S2FF-RED) equips 2015–2021 Subaru STI owners with a top-tier performance upgrade designed to deliver sharper throttle response, stronger mid-range power, and the added versatility of Flex Fuel capability. Built around COBB’s high-flow Redline Carbon Fiber intake system and NexGen components, this package unlocks the STI’s true potential by improving airflow efficiency and allowing the EJ25 to take full advantage of ethanol-based fuels.

KEY FEATURES

• Complete NexGen Stage 2+ upgrade engineered for 2015–2021 Subaru STI
• Flex Fuel capability enables optimized power gains when running E85 or pump fuel
• Redline Carbon Fiber intake system improves airflow while reducing restriction
• NexGen components deliver increased boost stability and more efficient turbo response
• Enhanced mid-range torque and smoother overall power delivery
• Supports higher performance targets with improved engine efficiency
• Perfect foundation for drivers seeking a powerful, responsive, and flexible tuning setup
• Direct-fit components ensure clean installation and long-term reliability

TECHNICAL SPECIFICATIONS

• Platform Compatibility: Subaru STI 2015–2021
• Package Level: NexGen Stage 2+ with integrated Flex Fuel support
• Intake System: Redline Carbon Fiber intake for maximum airflow and reduced heat absorption
• Fuel Compatibility: Supports ethanol blends (up to E85) with COBB Flex Fuel tuning
• Performance Benefits: Greater turbo efficiency, improved airflow, increased torque, and enhanced throttle response
• Tuning Requirement: COBB NexGen Stage 2+ Flex Fuel calibration required for optimal results
• Application: Ideal for high-performance street builds and enthusiast-driven STI platforms

VEHICLE FITMENT

• Subaru STI 2015–2021

COBB delivers proven, data-driven performance solutions engineered to optimize your Subaru with unmatched precision and reliability.