• COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
  • COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)
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COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)

COBB NexGen Stage 2 + Flex Fuel Power Package w/ Redline Carbon Fiber Intake | Subaru STI (15-21) (SUB004NG2S2FF-RED)

SUB004NG2S2FF-RED

In stock

$4,665.00 USD
$4,665.00 USD $4,665.00 USD
ADDITIONAL DISCOUNTS APPLIED AT CHECKOUT Sold out

The COBB NexGen Stage 2 + Flex Fuel Power Package with Redline Carbon Fiber Intake is a comprehensive bolt-on performance kit designed specifically for the 2015–2021 Subaru WRX STI. This package centers around the Subaru Accessport V3 (AP3-SUB-004), providing advanced tuning control to unlock Stage 2-level power gains while offering seamless ethanol fuel flexibility. Key components include the Redline Carbon Fiber Intake (725350) for improved airflow, Nexgen Flex Fuel Ethanol Sensor Kit (325650) for precise fuel management, Top Feed 1050x Fuel Injectors (312150), and a complete Subaru Fuel Rail Line Kit (343250) with a Fuel Pressure Regulator (315250). The kit also features upgraded Fuel Rails (343150) and a Silicone Turbo Inlet (712450), all engineered to enhance engine performance, reliability, and throttle response under demanding conditions.

This package is tailored for the 2015 to 2021 Subaru WRX STI platform, providing a direct bolt-on installation with no major modifications required. It is ideal for enthusiasts seeking a reliable upgrade for street, track, or spirited daily driving with the added benefit of flex fuel capability. The included components work cohesively to optimize fuel delivery and intake efficiency, ensuring compatibility with ethanol blends for enhanced power output. This kit is perfect for drivers aiming to maximize their STI’s potential with a professionally engineered, plug-and-play solution that maintains OEM-level reliability and drivability.

Overview

COBB Performance Drivetrain / Engine Component

Fitment: 2015-2021 Subaru WRX STI

Part #: SUB004NG2S2FF-RED

Overview

The COBB NexGen Stage 2 + Flex Fuel Power Package with Redline Carbon Fiber Intake is a comprehensive bolt-on performance kit designed specifically for the 2015-2021 Subaru WRX STI platform. This package is centered around the highly regarded COBB Accessport V3, providing precise tuning control and seamless ethanol fuel flexibility. Ideal for enthusiasts seeking a reliable and efficient power upgrade, this kit delivers Stage 2-level performance enhancements while maintaining drivability and fuel adaptability.

Engineered for STI owners who want to maximize their vehicle’s potential, the package combines advanced fueling components with a lightweight carbon fiber intake to support improved airflow and throttle response. The inclusion of flex fuel capability allows users to optimize performance across a range of ethanol blends, making it a versatile solution for varied driving conditions.

Key Features

This all-in-one power package includes carefully selected components designed to work in harmony for enhanced engine performance and tuning flexibility:

  • COBB Accessport V3 (AP3-SUB-004) for advanced ECU tuning and monitoring
  • Redline Carbon Fiber Intake (725350) for improved airflow and reduced intake temperatures
  • Nexgen Flex Fuel Ethanol Sensor Kit (325650) enabling seamless ethanol blend detection and tuning
  • Top Feed 1050x Fuel Injectors (312150) to support increased fueling demands
  • Subaru Fuel Rail Line Kit (343250) for optimized fuel delivery
  • Fuel Pressure Regulator for Fuel Rail Kit (315250) to maintain consistent fuel pressure
  • Fuel Rails (343150) engineered for reliable fuel flow
  • Silicone Turbo Inlet (712450) enhancing turbocharger response and durability

Installation & Fitment

This package is designed for direct bolt-on installation on compatible 2015-2021 Subaru WRX STI models. While the components are engineered for straightforward integration, it is recommended to verify fitment against your specific vehicle details and consult installation instructions to ensure proper setup and tuning.

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