IAG Performance V3 Silver Top Feed TGV Housings with Butterfly Pass-Thru 2008-2014 WRX / 2007-2021 STI / 2007-2012 LGT / 2009-2013 FXT

The IAG V3 Top Feed TGV (Tumble Generator Valve) Housings are a fully redesigned upgrade for Subaru intake manifolds, engineered to improve airflow and maintain OEM emissions compatibility.

Benefits:

• Improved Airflow: New port shapes increase efficiency, delivering up to 5 WHP over IAG V2 TGV housings and 13 WHP over stock housings.
• OEM Emissions Compatible: Maintains all factory emissions components, eliminating the need for a custom tune when installed alone.
• Turbocharger Clearance: Provides additional clearance for larger inlet turbochargers.

Construction & Design:

• CNC machined in-house from 6061 aircraft-grade aluminum.
  
• Compatible with all popular aftermarket and stock injectors.
• Innovative design accommodates multiple upper manifold bolt patterns.
• Custom injection-molded fittings allow installation of OEM motors, shafts, and butterfly valves.

These housings are suitable for stock and performance builds alike, offering noticeable power gains while preserving OEM functionality. Professional tuning is recommended when combined with other modifications for optimal results.

Included:

• 2x TGV Housings
• 1x Hardware Bag
• 4x Injection Molded Housing Adapters

Notes:

• OEM emissions components not included - please re-use your original parts
• Compatible with single combined motor/sensor assembly ONLY. Not compatible with separate sensor/motor assemblies found in older Subarus. Not compatible with fuel line kits which require the removal of the OEM TGV motors/sensors.

Installation Instructions