Weapon R 306-113-101 Secret Weapon Intake for 00-04 Subaru Forester 2.2L/2.5L

Vehicle Fitment

• 2000-2002 Subaru Forester (Base, L, S - 2.2L/2.5L H4, AWD)
• 2003-2004 Subaru Forester (X, XS - 2.5L H4, AWD)
• 2004 Subaru Forester (XT - 2.5L H4 Turbo, AWD)
• 2000-2001 Subaru Impreza (L - 2.2L/2.5L H4, AWD/FWD)
• 2000-2004 Subaru Impreza (Outback, RS - 2.5L H4, AWD/FWD)
• 2002-2004 Subaru Impreza (TS - 2.5L H4, AWD/FWD)
• 2000-2004 Subaru Legacy (GT, L - 2.5L H4, AWD/FWD)
• 2000-2002 Subaru Legacy (GT Limited - 2.5L H4, AWD)
• 2000 Subaru Legacy (Brighton - 2.2L H4, AWD/FWD)
• 2003 Subaru Legacy (L SE - 2.5L H4, AWD)
• 2004 Subaru Legacy (L 35th Anniversary - 2.5L H4, AWD)

Fitment Notes

• Fits non-turbo naturally aspirated 2.2L (EJ22) and 2.5L (EJ25) horizontally-opposed 4-cylinder engines
• Also listed for the 2004 Forester XT (2.5L turbo EJ255) - verify intake configuration before ordering
• Does not fit 2002-2004 Subaru Impreza WRX or WRX STI (turbocharged EJ20/EJ205/EJ257 - different intake)
• Not CARB legal - not for sale or use in California

Features

• Patented dual air velocity profile technology delivers up to 3x more airflow than the stock intake
• Leverages the Coanda effect and Bernoulli's principle to maximize air mass and velocity delivery
• Intake pipe precision-bent from 6061 billet aluminum via CNC mandrel bending for unrestricted flow
• SW1 air filter with tuned velocity stack reduces turbulence and increases intake air velocity
• 1-inch thick high-flow reusable polyurethane foam filter element for long-lasting filtration
• Dyno-tested for measurable gains in horsepower, torque, and throttle response
• Direct bolt-on fitment - no cutting or permanent modifications required
• Backed by Weapon-R's 1 Million Mile Limited Warranty and USA Patent #7,263,961B2

Specifications

• Part Number: 306-113-101
• Intake Pipe Material: 6061 Billet Aluminum
• Finish: Polished (mirror finish)
• Filter Type: SW1 - 1-inch high-flow reusable polyurethane foam with tuned velocity stack
• Engine (2.2L): EJ22 SOHC Flat-4, naturally aspirated
• Engine (2.5L): EJ25 SOHC/DOHC Flat-4, naturally aspirated
• Drivetrain: AWD (primary) / FWD (select Impreza and Legacy trims)
• USA Patent: #7,263,961B2
• CARB Status: Not CARB legal - not for sale in California

Included Components

• 1x Weapon-R Secret Weapon Polished Aluminum Intake Pipe
• 1x SW1 Secret Weapon Air Filter with Tuned Velocity Stack
• 1x Hardware/Clamp Installation Kit

Product Description

The Weapon-R Secret Weapon Intake (306-113-101) is engineered for the 2000-2004 Subaru Forester, Impreza, and Legacy equipped with naturally aspirated 2.2L (EJ22) or 2.5L (EJ25) horizontally-opposed four-cylinder engines. Using Weapon-R's patented dual-velocity airflow technology - grounded in the Coanda effect and Bernoulli's principle - this intake generates two distinct airstreams at different velocities, delivering up to three times more air than the factory airbox. The intake pipe is CNC mandrel-bent from 6061 billet aluminum and finished to a high-gloss polished mirror finish for both flow efficiency and engine bay appearance.

Installation is a direct bolt-on replacement requiring no cutting or permanent modifications, making it an accessible first upgrade for naturally aspirated Subaru owners. The included SW1 filter features a tuned velocity stack and a 1-inch thick reusable polyurethane foam element that reduces intake turbulence while providing reliable long-term filtration. Note that this intake is designed for non-turbo EJ22/EJ25 applications; it does not fit the turbocharged WRX or STI platforms. Backed by a 1 Million Mile Limited Warranty and US Patent #7,263,961B2, this is a proven bolt-on upgrade for Forester, Impreza, and Legacy NA drivers.