Originally Posted by
Wrxgurl06
LOL, VF-43
But I think the first year of the 43 was in '07.
Ahhhh I got confused then. I was thinking VF-42 but remembered that was the turbo in the S204, which makes it twin scroll. Makes sense.
A quick blurb I found about it:
The VF43 turbo is only available on the '07 STI's. The 04-06 STI's came with the VF39 turbo - they were prone to cracking and boost creep. The VF43 supposedly has more resistance to cracking and it also has a bigger hotside (WG). This also helps prevent boost creep.
All in all, this is a better turbo upgrade than a VF39 for earlier model turboed Subaru's, for WRX owners who are doing an STI swap, or for STI owners returning to stock.