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Old 08-10-2008, 11:05 PM   #1
sti-zy wagon
Scooby Newbie
Member#: 88109
Join Date: May 2005
Chapter/Region: NESIC
Location: Lewiston, Maine
1999 Legacy w/STi V4
"Hunter" Green

Default spec difference of vf43 and vf48

i was just wondering what the difference between these two turbos are? are they even that different? i havent heard much on the vf48 and would just like to get some info on it. and i did do some searching but didn't find to much. Thanks
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Old 08-11-2008, 05:16 AM   #2
👏 Big Ron 👏
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Join Date: Apr 2002
Chapter/Region: MAIC
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Without starting a debate, no one knows for 100% sure. I've seen rumors both ways, but to my knowledge no one has had both apart to measure and measuring is proof in the pudding.
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Old 08-11-2008, 05:42 AM   #3
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Member#: 91712
Join Date: Jul 2005
Chapter/Region: VIC
Location: Vancouver Island
2006 Evolution IX
Wicked White


check out this thread

my 39's oilseal has gone poof, and i got a 48 for a good price (still in the mail) so i figure it was a good choice of upgrade. theres a few other threads in here of people with 48s putting down some nice numbers.

i believe the real subydude made a thread about his experience with it. Im looking forward to bolting it on and get it dynoed.
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Old 11-21-2012, 02:00 PM   #4
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Join Date: May 2006
Chapter/Region: MAIC
Location: Northern VA
2009 DGM LGT Spec.B
08 Audi Q7 4.2 PRM


VF30, VF37, VF39, VF43, VF48, and VF52 are all the same core RHF55 turbo. Only differences are the turbine housing in the case of the VF37, and compressor housing in the case of the VF52. The only differences between a VF30, VF39, VF43, and VF48 are subtle changes to the compressor housings to accommodate changes to the STI intake and oil feed setup over the various years. The VF48 and VF52 also have different wastegate actuators for their respective applications.

You can use an RHF55 core on any of these turbos/compressor/turbine housing combinations and it will work fine.


Last edited by soobaviator; 11-21-2012 at 02:07 PM.
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