From the very rare IHI VF15 to the latest twin scroll ball bearing VF56, you will find here after an almost complete listing of the IHI turbochargers family applicable to many of the SUBARU models, starting from the 1991 Legacy to the latest 2015 Impreza. If you can't find what you are looking for or if you think there is anything to be corrected, please feel free to send me an email !
IHI VF10
This is the standard equipment turbocharger used on the USDM Legacy 4EAT MY91-94.
IHI VF11
This is the standard equipment turbocharger used on the USDM Legacy 5MT MY91-94.
IHI VF12
This is the standard equipment turbocharger used on the JDM Legacy RS MY89-93.
IHI VF13
This is the standard equipment primary turbocharger used on the JDM Legacy MY93-95.
IHI VF14
This is the standard equipment secondary turbocharger used on the JDM Legacy MY93-95.
IHI VF15
This is the group A turbocharger used by Prodrive on the legendary Impreza 555 GrA.
IHI VF18
This is the standard equipment primary turbocharger used on the JDM Legacy MY96.
IHI VF19
This is the standard equipment secondary turbocharger used on the JDM Legacy MY96.
IHI VF20
This is the standard equipment turbocharger used on the JDM Legacy MY97.
IHI VF22
(490cfm at 18.0psi, 250-325whp, Bolt-On)
This is the standard equipment turbocharger used on the JDM V3 Subaru
Impreza WRX and optional on the JDM Subaru Impreza WRX STi 22b. Of all
the IHI models, the VF22 has the largest potential for peak horsepower,
and is capable of supporting the highest boost levels. It is capable of
running up to 25 psi. The VF22 is a roller bearing turbo that utilizes
the P20 exhaust housing.
IHI VF23
(388cfm at 18psi, 250-325whp, Bolt-On)
This is the standard equipment turbocharger used on the JDM Subaru
Impreza WRX STi 22b. The VF23 is a ball bearing turbocharger that
utilizes the P20 exhaust housing like the VF22. This housing is mated
with the smaller compressor housing of the VF24 for fast response and
excellent low and mid-range performance. It does not have the same top
end power of the VF22, but spools up slightly quicker.
IHI VF24
(425cfm at 18psi, 250-325whp, Bolt-On)
This is the standard equipment turbocharger used on the JDM V4 Subaru
Impreza WRX STi. This turbo shares its compressor housing with the VF23,
however, this housing is mated with a smaller (P18) exhaust side. The
smaller characteristics of this turbo allow it to provide ample bottom
end power and quick spool. This turbo is very popular for Imprezas with
automatic transmissions and Group-N rally cars.
IHI VF25
This is the standard equipment primary turbocharger used on the JDM Legacy B4. Utilizes a thrust-bearing design and a P12 exhaust housing.
IHI VF26
(400cfm at 18psi)
This is the standard equipment primary turbocharger used on the JDM
Legacy B4. Utilizes a divided thrust-bearing design and a B14 exhaust
housing.
IHI VF27
(420cfm at 18psi)
This is the standard equipment secondary turbocharger used on the JDM
Legacy. Utilizes a ball-bearing design and a P18 exhaust housing.
IHI VF28
(425cfm at 18psi, 250-325whp, Bolt-On)
This is the standard equipment turbocharger used on the JDM V5 Subaru Impreza WRX STi.
IHI VF29
(425cfm at 18psi, 250-325whp, Bolt-On)
This is the standard equipment turbocharger on the JDM V6 Subaru Impreza
WRX STi. The VF29 is nearly identical to the VF24, with the same
compressor and exhaust housings. However, the compressor wheel in the
VF29 has been changed slightly. The changes made to the compressor wheel
in this model are generally viewed as improvements, and as such, this
unit is typically chosen over the VF24. Has a different location for the
pressure hose on the wastegate actuator.
IHI VF30
(460cfm at 18psi, 250-325whp, Bolt-On)
This is the standard equipment turbocharger used on the JDM V7 Subaru
Impreza WRX STi. The VF30 is a thrust-bearing turbo that utilizes the
P18 exhaust housing of a VF24 and the compressor housing sized between a
VF23 and a VF22.
IHI VF31
Utilizes a P11 exhaust housing.
IHI VF32
This is the standard equipment primary turbocharger used on the JDM
Legacy. It utilizes a ball-bearing design.
IHI VF33
This is the standard equipment primary turbocharger used on the JDM Legacy. It utilizes a P11 exhaust housing and a divided thrust-bearing design.
IHI VF34
(460cfm at 18psi, 250-325whp, Bolt-On)
This is the standard equipment turbocharger used on the JDM V7 Subaru
Impreza WRX STi Spec-C. The VF34 is nearly identical to the VF30 but has
improved spool up due to its roller bearing design. It utilizes a
P18 exhaust housing.
IHI VF35
(425cfm, 250-315whp, Bolt-On)
This is the standard equipment turbocharger used on the JDM Subaru
Impreza WRX and EDM Subaru Impreza WRX STI 2.0L. The VF35 is similar to the VF34. It utilizes the same
compressor housing and the same compressor inducer size. The differences
are in the divided thrust-bearing design and the P15 exhaust housing.
This allows the VF35 to spool slightly quicker than the VF34 at the cost
of less top-end performance.
IHI VF36
(430cfm, 250-325whp, twin scroll, ball bearing)
This is the standard equipment turbocharger used on the JDM V8-V9 Subaru
Impreza WRX STI Spec-C. The VF36 is a twin-scroll turbocharger
that utilizes a ball bearing design, a P25 exhaust housing, and titanium
aluminide (TiAl) compressor wheel for improved spool. It is essentially
a twin scroll fast spooling VF34.
IHI VF37
(430cfm, 250-325whp, twin scroll)
This is the standard equipment turbocharger used on the JDM V8-V9 Subaru
Impreza WRX STI. The VF37 is a twin-scroll turbocharger that utilizes a
thrust bearing design and a P25 exhaust housing. It is essentially a twin scroll
fast spooling VF30.
IHI VF38
This is the standard equipment turbocharger used on the JDM Legacy MY04-06. The VF38 is a twin-scroll that utilizes a Titanium turbine and shaft. This turbocharger yields tremendous spool-up but offers less top-end than the VF36/VF37. The spool capabilities of this turbo are demonstrated on the JDM Legacy GT, which reaches peak torque at 2400RPM.
IHI VF39
(250-325whp, Bolt-On)
This is the standard equipment turbocharger used on the USDM & EDM Subaru
Impreza WRX STI 2.5L. The
VF39 utilizes a thrust bearing design and the P18 exhaust housing.
IHI VF40
This is the standard equipment turbocharger used on the USDM Subaru Legacy GT MY05-06.
IHI VF41
This is the standard equipment turbocharger used on the JDM Subaru Forester STI. It utilizes a P18 exhaust housing.
IHI VF42
(490cfm at 18.0psi, 250-325whp, twin scroll, ball bearing)
This is the standard equipment turbocharger used on the JDM Subaru
Impreza WRX STi S203 and S204. The VF42 features a twin-scroll design
with a slightly larger compressor than the VF36/VF37 turbos and
different turbine design (more blades). The VF42 is a roller-bearing
turbo and is similar in size to the VF22 turbo, but the twin-scroll
exhaust housing yields faster spool-up and a superior top-end.
IHI VF43
(250-325whp, Bolt-On)
This is the standard equipment turbocharger used on the MY07 USDM Subaru
Impreza WRX STI. It can be found on both base STI’s and STI Limited’s.
The VF43 utilizes a thrust bearing design and the P18 exhaust housing.
The primary difference between the VF43 and the VF39 used previously on
STI’s seems to be the stiffness of the wastegate. The VF43 has a stiffer
wastegate designed to reduce boost creep issues.
IHI VF44
This is the standard equipment turbocharger used on the JDM Legacy GT
MY06.
IHI VF45
This is the standard equipment turbocharger used on the JDM Legacy GT
MY07.
IHI VF46
This is the standard equipment turbocharger used on the USDM Subaru
Legacy GT MY07. The VF46 utilizes a new five-arc scroll design to
improve low and midrange performance over the previous VF40.
IHI VF48
(250-325whp, Bolt-On)
This is the standard equipment turbocharger used on the USDM Subaru WRX
STI MY08-10. The primary difference between the VF48 and the VF43 used
previously on STI’s is the more advanced bearing design.
IHI VF49
(250-325whp, twin scroll)
This is the standard equipment turbocharger used on the JDM Subaru WRX STi MY08-10, twin scroll turbin housing, thrust bearing.
Compressor housing designed for DBW throttle body.
IHI VF52
(250-325whp, Bolt-On)
This is the standard equipment turbocharger used on the USDM Subaru WRX
MY09-10. This turbocharger is similar to the VF48 but utilizes the USDM
Legacy GT-style housing.
Expect to achieve full boost with the proper mods and a quality tune
between 2800-3300rpms. This is NOT a direct bolt-on for 2002-2007 WRX,
but will fit the 2008 WRX and 2005+ Legacy GT without modification.
IHI VF53
(250-325whp, twin scroll, ball bearing)
This is the standard equipment turbocharger used on the JDM Subaru WRX
STI Spec C MY10, twin scroll turbine housing, ball bearing.
Compressor housing designed for DBW throttle body. 5 arc design compressor cover ?
IHI VF56
(250-350whp, twin scroll, ball bearing)
This is the standard equipment turbocharger used on the JDM Subaru WRX
STI limited R205 and S206, twin scroll turbine housing, ball bearing, titanium. This turbo is the modern version of the VF42, Compressor housing designed for DBW throttle body.
(IHI turbo listing for recreationnal purposes only, with reference IHI Vehicular Turbochargers infos / own findings / NASIOC / Scoobynet).