• COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
  • COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)
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COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)

COBB Stage 1 to NexGen Stage 2+ Flex Fuel Power Package Upgrade w/ Black Intake | Subaru STI (15-18) (SUB004NG2S1FF-S1-UP-BK)

SUB004NG2S1FF-S1-UP-BK

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 Black Intake is a comprehensive performance enhancement kit designed specifically for the 2015-2018 Subaru WRX STI. This package builds upon the Stage 1 setup by adding a high-flow SF intake and airbox, a silicone turbo inlet version 2, throttle body coupler, upgraded spark plugs, and top-feed 1050cc fuel injectors. It also includes a high-flow fuel pump, fuel pressure regulator, fuel rail line kit, and fuel rails to support increased fuel delivery. The NexGen Flex Fuel Ethanol Sensor Kit and fuel pressure sensor kit enable precise fuel management for flex fuel applications, optimizing power and efficiency. Constructed with quality materials, this upgrade ensures improved airflow, fuel delivery, and engine responsiveness for enhanced performance and durability.

This upgrade package is designed exclusively for the 2015–2018 Subaru WRX STI models and requires prior ownership of the COBB Stage 1 Power Package. It serves as a direct bolt-on upgrade to elevate your existing setup to Stage 2+ with flex fuel capability. Installation involves replacing and upgrading key intake and fuel system components included in the kit. Ideal for street and track enthusiasts seeking increased power and flexibility in fuel options, this package supports aggressive driving and tuning while maintaining reliability. The kit includes all necessary components for a complete upgrade, ensuring compatibility and ease of installation for STI owners aiming to maximize their vehicle’s performance potential.

Overview

COBB Power Package Upgrade

Fitment: 2015-2018 Subaru WRX STI

Part #: SUB004NG2S1FF-S1-UP-BK

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 are looking to elevate their vehicle’s power and fueling capabilities with advanced components tailored for flex fuel compatibility.

This package delivers a complete set of high-quality parts including a black intake system, silicone turbo inlet, upgraded fuel injectors, and advanced fuel management sensors. It supports improved airflow, fuel delivery, and engine responsiveness, helping to maximize the potential of your STI while maintaining reliability and drivability.

Key Features

This upgrade package includes a carefully selected combination of components designed to work seamlessly together:

  • SF Intake and Airbox in black finish for enhanced airflow and engine bay aesthetics
  • Silicone Turbo Inlet V2 and Throttle Body Coupler to improve turbo response and reduce intake restrictions
  • High-performance Top Feed 1050x Fuel Injectors and High Flow Fuel Pump for increased fueling capacity
  • Fuel Pressure Regulator, Fuel Rail Line Kit, and Fuel Rails to ensure consistent and precise fuel delivery
  • NexGen Flex Fuel Ethanol Sensor Kit and Fuel Pressure Sensor Kit for accurate fuel management and tuning flexibility
  • Includes the COBB Vehicle Badge as a mark of upgrade authenticity

Installation & Fitment

This package is designed as an upgrade path for existing COBB Stage 1 Power Package owners and fits the 2015-2018 Subaru WRX STI models. Installation involves replacing and upgrading multiple fuel system and intake components, so professional installation or advanced mechanical knowledge is recommended to ensure proper fitment and optimal performance.

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