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Subaru 'TGV Delete' Intake Manifold Risers (04-06 Impreza STi)


Subaru 14003AB931

Applications: 2004-2006 Impreza STi, 2005-UP Legacy GT and Outback GT, and Forester XT

Genuine JDM intake manifold risers are a perfect fit and delete the 'TGV' flapper valves that can restrict the air flow into your engine. Called 'Tumble Generator Valves' by Subaru, these are common in many vehicles and are used to help emissions by closing off a significant portion of your intake to 'tumble' the air at idle and low loads, emissions can be improved. At high loads these valves become restrictions. Works with OE or aftermarket fuel rails and injectors. This part fits USDM 2.5L turbo engines using side feed Injectors. Will work with 2004-2006 Impreza STi, 2005-UP Legacy GT and Outback GT, and Forester XT. Will not work with 2002-2005 WRX because it uses top feed style Injectors. Your check engine light will need to be 'flashed' off. Sold as pairs.

Note: The intake manifold center holes will need to be elongated (slotted) for these to fit your USDM STi. The gaskets that go between the intake manifold and the tumbler deletes has an elongated hole so it is easy to see where you need to slot the manifold. This gasket is used on both the USDM and JDM manifolds. Also the standard tumbler generator has a hole to hold the harness bracket where the TGV deletes do not have. The harness does not move enough for this to be necessary. If you have any questions please call.

This part fits USDM 2.5L turbo engines w/SIDE FEED injectors.

Sold as pairs.

***Slight modification of the center bolt holes will be needed for proper fitment on the USDM STI 2.5L.(red manifold)***

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