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TGV Housing Kits, Subaru EJ


Click here to download installation instructions (PDF)

STOP! THIS PRODUCT HAS LEGAL RESTRICTIONS. READ THIS BEFORE INSTALLING/USING!
WARNING!

THIS IS A RACE ONLY PRODUCT MANUFACTURED AND SOLD FOR INSTALLATION ON VEHICLES DESIGNED TO BE USED SOLELY FOR COMPETITION PURPOSES. ONCE THIS PART IS INSTALLED, THE VEHICLE MAY NEVER BE USED, OR REGISTERED OR LICENSED FOR USE, ON A PUBLIC ROAD OR HIGHWAY. IF YOU INSTALL THIS PART ON YOUR VEHICLE AND USE THE VEHICLE ON A PUBLIC ROAD OR HIGHWAY, YOU WILL VIOLATE THE CLEAN AIR ACT AND MAY BE SUBJECT TO PERSONAL CIVIL OR CRIMINAL LIABILITY, INCLUDING FINES OF UP TO $4,819 PER DAY.

IT IS THE RESPONSIBILITY OF THE INSTALLER AND/OR USER OF THIS PRODUCT TO ENSURE THAT IT IS USED IN COMPLIANCE WITH ALL APPLICABLE LAWS AND REGULATIONS. IF THIS PRODUCT WAS PURCHASED IN ERROR, DO NOT INSTALL AND/OR USE IT. THE PURCHASER MUST ARRANGE TO RETURN THE PRODUCT FOR A FULL REFUND.

THIS POLICY ONLY APPLIES TO INSTALLERS AND/OR USERS WHO ARE LOCATED IN THE UNITED STATES; HOWEVER, CUSTOMERS WHO RESIDE IN OTHER COUNTRIES SHOULD ACT IN ACCORDANCE WITH THEIR LOCAL LAWS AND REGULATIONS.

Vehicle Compatibility
02-14 Subaru Impreza WRX
07-19 Subaru Impreza STi
06-13 Subaru Forester XT
07-12 Subaru Legacy GT
07-12 Subaru Outback XT
05-06 Saab 9-2X Aero
04-06 Subaru Impreza STi - top feed fuel rails and injectors required
05-06 Subaru Legacy GT - top feed fuel rails and injectors required
04-05 Subaru Forester XT - top feed fuel rails and injectors required
04-05 Subaru Outback XT - top feed fuel rails and injectors required


FEATURES

The OEM tumble generator valves on the Subaru EJ engines create an air flow restriction. Radium Engineering TGV housings feature a smooth bore and permit the option to use secondary injectors for high fuel demands.

These TGV housings were designed in-house and utilize die-cast manufacturing to achieve shapes and features not possible with other manufacturing methods. The inner bores are perfectly smooth without machining marks. Even with the extra features, they are 56% lighter than OEM TGVs and 14% lighter than CNC billet variations.

The outer mounting bosses on the TGV housing have been redesigned to provide additional clearance for larger turbo inlet pipes.

Dual port injection (per runner) capability make these a good match for high power engines using alternative fuels. However, they can also be used in a standard single injector configuration.

The eccentric threaded blocks make these TGV housings compatible with a wide variety of Subaru EJ intake manifolds.

NOTE: Because the TGV potentiometers and DC motors are removed, ECU tuning is required.


FUEL RAIL COMPATIBILITY

CLICK HERE for compatible fuel rails. Either 20-0567-02 or 20-0479-02 will work. Choose 20-0479-02 if running a fuel pulse damper and there are concerns about clearance with AVCS solenoids.



As shown above, all OEM and aftermarket replacement (top feed) fuel rails are compatible, including Radium fuel rails 20-0567-02 or 20-0479-02 (found HERE). Furthermore, the TGV housings are compatible with OEM top feed Subaru fuel injectors or any aftermarket OEM equivalent injectors.
If additional fuel injectors (8 total) are required, the preinstalled 2AN ORB plugs can simply be unscrewed from the upper injector ports and the Radium 20-0499 DPI Fuel Rail can be used, as shown below. More information on Dual Port Injection HERE.


NOTES:
1. Fuel rails that convert from side feed to top feed injectors are NOT compatible.
2. Because the TGV potentiometers and DC motors are removed, ECU tuning is required.


SURFACE FINISH


20-0489-01 TGV HOUSING KIT, SUBARU EJ, UNCOATED
These TGV housings are bare aluminum with a satin finish. If the user would like to add a surface treatment of their own (paint, powder coat, etc) know that die-cast aluminum alloy is not compatible with anodizing. 


20-0489-00 TGV HOUSING KIT, SUBARU EJ, COATED
These TGV housings utilize a Cerakote black coating originally formulated in Oregon, USA for the firearms industry. Cerakote is a state-of-the-art polymer-ceramic composite coating. It is only 0.001" thick and exceeds powder coat with resistance to abrasion, wear, chemical, and corrosion and is superior in impact strength and hardness.


WHAT'S INCLUDED


Contents of the kit are shown in the photos below. Fuel rails are sold separately.

-Aluminum TGV Housings (x2)
-Aluminum Eccentric Manifold Blocks (x2)
-Dual Port Injection 2AN ORB Plugs (x4)
-TGV to Cylinder Head Gaskets (x2)
-Stainless Steel Hardware (x4)
-Flanged JIS Hex Head Bolts (x4)



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