This page is an attempt to compile a list of engine parts from the USDM Subaru that are compatible with the JDM Subaru engines. Remember, if you can't find a USDM part, just get online, and look at UK Parts. Like UK Ebay. This page is NOT the authority on JDM->USDM Parts. This is simply a place where I've been trying to keep track of them.
The nice thing about the EJ series engine, is that it's kinda like Leggo. Most major parts fit each other EJ engine. Things like the oil pan and such. For example, a lot of the JDM EJ20 motors share many many parts with the USDM EJ18. Including the crank, rods, oil filter and air filter.
The Legacy Turbo should have a few parts that fit also.
Check out [www.1stsubaruparts.com] for USDM Parts.
The source for this list of parts is this RS25.com thread [EJ20G holy grail of part #'s]
| JDM Part | USDM Part Number | Notes |
|---|---|---|
| Gasket and Seat Kit | 10105AA120 | NA (Not Available) |
| Cover Assembly - belt No. 2 right | 13568AA072 | |
| Sealing - Belt cover No. 1 | 13583AA080 | |
| Sealing - Belt cover No. 2 Left | 135586AA041 NA | |
| Sealing x2 - Belt cover No.2 | 13583AA031 | |
| Cover - Belt No.1 Right | 13572AA043 | |
| Cover Belt, Front | 1357AA044 NA | |
| Cover - Belt No.1 Left | 13574AA031 | |
| Sealing - Belt cover No. 2 Front | 13594AA000 | |
| Sealing - Belt Cover No. 1 Front | 13581AA050 | |
| Sealing - Belt Cover No. 3 | 13584AA050 | |
| Sealing - Belt cover No. 1 Left | 13585AA061 | |
| Cover - Belt No.2 Left | 13575AA044 | |
| Belt - Timing | 13028AA072 | |
| Adjuster Complete - Belt tensioner | 13068AA027 | Part number 13068AA027 was superceded by part number 13068AA051. |
| Idler Complete - Belt, No.2 | 13085AA010 | Part number 13085AA010 was superceded by part number 13085AA080. |
| Tensioner Assembly - Belt | 13069AA062 | NA |
| Pulley - Crankshaft | 12305AA130 | Part number 12305AA130 was superceded by part number 12305AA242. |
| Oil Pan Assembly - Engine | 11109AA051 | Part number 11109AA051 was superceded by part number 11109AA053. |
| Sealing - Oil Pan | 11122AA000 | Part number 11122AA000 was superceded by part number 11122AA340. |
| Bolt x12 | 800706630 | |
| Washer x12 - rocker cover | 13271AA003 | Part number 13271AA003 was superceded by part number 13271AA051. |
| Gasket - Rocker Cover, Right | 13270AA040 | |
| Gasket x4 - Rocker Cover No. 2 | 13293AA030 | |
| Gasket x4 - Rocker Cover No. 2 | 13293AA030 | |
| Gasket - Oil Separator Cover | 11832AA021 | Part number 11832AA021 was superceded by part number 11832AA022. |
| Gasket - Rocker Cover, Left | 13272AA040 | |
| Gasket x4 - Rocker Cover, No.2 | 13293AA030 | |
| Gasket x2 - Oil Separator Cover | 11832AA021 | |
| Oil Pump Assembly - Engine | 15010AA105 | Part number 15010AA105 was superceded by part number 15010AA300. |
| Gasket - Oil Cooler | 21370KA001 | |
| Gasket x2 - Cylinder Head | 11044AA355 | $30.06 (Is this the same as the jdm oem metal gaskets?!) |
| Water Pump Complete | 21111AA022 | $86.36 Part number 21111AA022 was superceded by part number 21111AA026. |
| Gasket - Water Pump | 21114AA030 | Part number 21114AA030 was superceded by part number 21114AA051. |
| Thermo Assembly | 21200AA071 | Part number 21200AA071 was superceded by part number 21200AA072. |
| Thermo Assembly | 21200AA072 | Part number 21200AA071 was superceded by part number 21200AA072. |
| Gasket - Thermostat | 21236AA010 | |
| Sealing - Water Pump | 21116AA010 | |
| Pipe complete - Water bypass | 14065AA010 | NA |
| Pipe Complete - Oil | 15192AA063 | NA |
| Gasket x2 | 803910050 | |
| Screw - Union | 15194AA110 | |
| Bolt & Washer Assembly | 800506350 | |
| Gasket x4 | 803912040 | |
| Stud Bolt x3 - Turbocharger | 14446AA000 | NA |
| Hose Clamp x2 - Hose Clamp | 805918010 | |
| Gasket x4 | 083914050 | NA |
| Pip Complete - Turbo No. 2 | 14430AA050 | NA |
| Screw x2 - union, A | 15194AA180 | NA |
| Hose - Water | 21144AA020 | |
| Gasket - oil turbo | 15196AA040 | NA |
| Bolt x2 - Turbocharger | 14443AA000 | |
| Hose Clamp x2 | 805922070 | Part number 805922070 was superceded by part number 805922080. |
| Hose | 807515712 | |
| Gasket x4 | 803912040 | |
| Pipe Complete - Turbocharger | 14423AA021 | NA |
| Screw Union - Turbo | 14439AA010 | |
| Screwn Union | 15194AA100 | |
| Flange Bolt | 01040614G | NA Part number 01040614G was superceded by part number 10406140. |
| Gasket x2 - Intake Manifold | 14035AA281 | |
| Gasket x2 - Exhuast Manifold | 14038AA000 | |
| Gasket - Intercooler | 21896AA002 | NA |
| Flange Bolt x3 - Pilot | 010008356 | |
| Spacer x3 | 45659AA000 | |
| Cushion x3 | 45668AA000 | |
| Stay - Inter Cooler | 21885AA041 | NA |
| Flange Bolt | 01041020g | Part number 01041020g was superceded by part number 01041020A. |
| Gasket - Exhaust Join Outlet | 44022AA170 | |
| Gasket - Exhaust Turbo Inlet | 44022AA150 | |
| Gasket - Exhaust Turbo Outlet | 44022AA180 | |
| Rocker bolt seal x 12 | 13271AA051 | |
| Rocker Gasket LH x 1 | 13272AA040 | |
| Rocker Gasket RH x 1 | 13270AA040 | |
| Spark Plug Gasket x 4 | 13293AA030 | |
| Front Crank Seal | 806733030 | |
| Rear Crank Seal | 806786040 | |
| Cam Seals (4x) | 806732150 | |
| Oil Filler Neck O-ring | 806923060 | |
| NGK G-Power Spark Plugs | BKR6EGP (x4) | |
| USDM WRX Turbo Upipipe Gasket | 44022AA150 | |
| USDM WRX Turbo Downpipe Gasket | 44022AA180 | |
| USDM WRX Turbo Studs (x3) | 800910340 | |
| USDM WRX Turbo Flange Bolt (x3) | 44015AC000 | |
| USDM WRX Turbo Downpipe Nuts (x3) | 902370029 |