• COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)
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COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)

COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Blue Intake | Subaru STI 2015-18 (SUB004NG2S1FF-S1-UP-BL)

SUB004NG2S1FF-S1-UP-BL

In stock

$3,780.00 USD
$3,780.00 USD $3,780.00 USD
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The COBB NexGen Stage 1 to Stage 2+ Flex Fuel Power Package Upgrade with Blue Intake is a comprehensive performance enhancement kit designed specifically for the 2015–2018 Subaru WRX STI. This upgrade package builds upon the existing Stage 1 setup, incorporating a high-flow SF Intake and Airbox, Silicone Turbo Inlet V2, and Throttle Body Coupler to optimize airflow. It also includes upgraded spark plugs, top-feed 1050cc fuel injectors, a high-flow fuel pump, and a fuel pressure regulator to support increased fuel delivery. The kit features a complete fuel rail line assembly, NexGen Flex Fuel Ethanol Sensor Kit, and Fuel Pressure Sensor Kit, ensuring precise fuel management and compatibility with flex fuel blends. Constructed with high-quality materials, this package enhances engine performance, reliability, and tuning flexibility for enthusiasts seeking significant power gains.

This upgrade is tailored for 2015 to 2018 Subaru WRX STI models, providing a direct bolt-on solution for those already equipped with the COBB Stage 1 Power Package. Installation involves replacing existing components with the included intake, fuel system upgrades, and sensor kits, maintaining OEM fitment and reliability. The package is ideal for street and track use, supporting flex fuel applications and advanced tuning strategies. The kit also includes a COBB vehicle badge as a finishing touch. This upgrade ensures compatibility with the STI’s engine management system and fuel system, delivering enhanced power and drivability for performance-focused drivers.

Overview

COBB Power Package Upgrade

Fitment: 2015-2018 Subaru WRX STI

Part #: SUB004NG2S1FF-S1-UP-BL

Overview

The COBB NexGen Stage 1 to Stage 2+ Flex Fuel Power Package Upgrade is a comprehensive performance drivetrain enhancement designed specifically for the 2015-2018 Subaru WRX STI. This upgrade is intended for enthusiasts who already own the COBB Stage 1 Power Package and want to elevate their vehicle’s power and fuel flexibility. By integrating advanced intake components, fuel system upgrades, and flex fuel capability, this package supports improved engine response and adaptability to ethanol blends.

This upgrade benefits drivers seeking enhanced throttle response, optimized fuel delivery, and the ability to run flex fuel blends for greater tuning versatility. It combines durability with precision engineering to help your STI perform more efficiently under demanding conditions while maintaining reliability.

Key Features

This power package upgrade includes a carefully selected set of components designed to work in harmony for maximum effect:

  • SF Intake and Airbox for improved airflow and filtration
  • Silicone Turbo Inlet V2 and Throttle Body Coupler to enhance boost response and reduce intake restrictions
  • High-performance spark plugs optimized for upgraded fuel delivery
  • Top Feed 1050x Fuel Injectors and High Flow Fuel Pump to support increased fuel demands
  • Fuel Pressure Regulator, Fuel Rail Line Kit, and Fuel Rails for precise fuel management
  • NexGen Flex Fuel Ethanol Sensor Kit and Fuel Pressure Sensor Kit for accurate flex fuel monitoring and tuning
  • COBB Vehicle Badge included as a mark of upgrade completion

Installation & Fitment

This upgrade is designed as a direct enhancement for vehicles already equipped with the COBB Stage 1 Power Package. Installation requires verifying compatibility with your existing setup and following COBB’s detailed instructions to ensure proper integration of all components. Fitment is specific to 2015-2018 Subaru WRX STI models, but always confirm against your vehicle’s details and part number before purchase.

Ideal For

Drivers who want to advance their STI’s performance beyond Stage 1, gain flex fuel capability, and improve throttle response will find this package ideal. It suits enthusiasts focused on tuning flexibility and enhanced fuel system support for spirited driving and track use.

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