Torque Solution TS-WH-497PS PNP Speed-Density Kit for 2002-07 Subaru WRX/STI

Vehicle Fitment

• 2002-2007 Subaru WRX (2.0L turbo / all trims)
• 2002-2007 Subaru WRX STI (2.5L turbo / all trims)
• 2005-2012 Subaru Forester XT (2.5L turbo)
• 2005-2012 Subaru Legacy GT (2.5L turbo)
• Fitment confirmed through 2012 for Legacy/Forester and 2007 for WRX/STI. 2013+ coverage unconfirmed at time of listing.

Features

• Plug-and-play wiring harness allows conversion from MAF to speed-density without cutting or splicing the OEM harness
• High-performance IAT (intake air temperature) sensor included for accurate tuning on turbocharged applications
• Stainless-steel weld-bung provided for secure IAT mounting in charge piping or throttle body side of intercooler system
• Pre-loomed, heat-resistant wiring harness with waterproof connectors for long-term durability
• 39" length harness to reach easily from engine bay to ECU plug location - reduces strain and simplifies installation
• Ideal for tuners seeking to eliminate MAF flow limits, support larger turbo systems or refine boost control via speed-density tuning
• Warranty coverage by manufacturer (1 year) on wiring and sensor components
• Direct OEM fitment - installed by enthusiasts and professional tuners alike

Specifications

• Part Number: TS-WH-497PS
• Application: Speed-Density Kit (MAF to SD conversion) with stainless steel IAT weld-bung
• Includes: Wiring harness, IAT sensor, weld-bung, mounting hardware
• Wire Loom: High-temp insulated, waterproof connectors
• Sensor: GM-style IAT sensor designed for direct tuning integration
• Installation: Plug-and-play with provided harness; welding required for IAT bung installation

Included Components

• 1x Plug-and-play wiring harness (39" length)
• 1x GM-style intake air temperature (IAT) sensor
• 1x Stainless-steel IAT weld-bung (3/8" NPT female)
• Installation hardware (zip-ties, protective loom, connector covers)

Product Description

The Torque Solution TS-WH-497PS PNP Speed-Density Kit is designed to offer serious performance gains for turbocharged Subaru enthusiasts running 2002-2007 WRX/STI and 2005-2012 Forester XT/Legacy GT models. By allowing a direct-plug conversion from the restrictive mass-air-flow (MAF) setup to a speed-density tuning strategy, this kit removes MAF induced limitations, improves throttle response and supports larger turbo/inlet systems. The included high-accuracy IAT sensor and stainless-steel weld-bung allow you to mount the sensor in an ideal location for tuning - typically just before the throttle body or at the top of the intercooler charge pipe.

Installation is straightforward for competent enthusiasts and professional tuners alike: the plug-and-play harness connects to the ECU and sensor without altering the OEM loom, while the weld-bung integrates cleanly into your intercooler piping. After installation, a custom tune is required to run the speed-density system correctly. Once tuned, your vehicle benefits from improved boost control, better supporting power upgrades, bigger turbos and track usage.

Whether you're prepping your WRX/STI for a high-boost build, freeing up airflow on your Legacy GT or turning your Forester XT into a daily-driven rally machine, the TS-WH-497PS offers a reliable and high-quality solution. Please note: This product is designed for performance use - always ensure the tuning is handled by a qualified professional and that the vehicle remains within safe operating parameters post-upgrade.