Torque Solution TS-WH-499PA PNP Speed Density Kit for 2008-2014 WRX

Vehicle Fitment

• 2008-2014 Subaru WRX (All trims, turbocharged AWD)
• 2008-2021 Subaru WRX STI (All trims, turbocharged AWD)

Features

• Plug-and-play speed density adapter harness (no cutting/splicing)
• Includes fast-response intake air temperature (IAT) sensor
• Aluminum IAT sensor weld-on bung for secure, precise mounting
• Waterproof connectors improve reliability in engine bay conditions
• 39" high-temperature loom for flexible, heat-resistant routing
• Direct fit for OEM harness without modification
• Enhances tuning flexibility when switching from MAF to speed density
• Backed by manufacturer 1-year warranty

Specifications

• Part number: TS-WH-499PA
• Application type: Speed density adapter kit
• Harness length: ~39" for optimal routing
• IAT bung size: 3/8"-18 NPT female
• Connector style: OEM-compatible waterproof plugs
• Material: High-temp wire loom with aluminum weld-on bung
• Installation location: Weld bung on intercooler or charge pipe
• Drivetrain supported: AWD only (common on WRX/STI) 

Included Components

• 1x PNP speed density adapter harness
• 1x Fast-response IAT sensor
• 1x Aluminum IAT weld-on bung: 3/8"-18 NPT

Product Description

The Torque Solution TS-WH-499PA PNP Speed Density Kit with aluminum bung is engineered for Subaru performance enthusiasts who want a clean, plug-and-play transition from a mass airflow (MAF) setup to a speed density engine management strategy. This harness kit eliminates the need for cutting into the OEM wiring harness, offering waterproof connectors and a durable high-temperature loom for reliable signal integrity and long-term performance under heat. The included fast-response IAT sensor and weld-on aluminum bung provide accurate intake air temperature readings - an essential input when tuning for speed density operation.

Designed specifically for turbocharged 2008-2014 Subaru WRX and 2008-2021 WRX STI models, this kit is ideal for drivers running modified or high-performance engine setups where precise tuning and airflow measurement are critical. Installation involves welding the IAT bung onto the intercooler pipe or charge pipe near the throttle body, and a custom engine tune (Protune) is required to fully complete the speed density conversion. Whether you're building a track car or maximizing performance, this kit simplifies wiring adaptation for advanced engine management.