Genuine Subaru MY06 WRX STi TMIC
Subaru Part No. 21820AA252
After feeling around underneath my SG9 STi TMIC I could tell that it already had a one piece alloy Y-Pipe. Cool. But when I tried to fit the TMIC I realised that the silicon pipe was a bit too short as the new TMIC was deeper, well that makes sense. No problem, I'll just get a longer silicon pipe and I'll remove my WRX STi TMIC so I know exactly what length pipe to make up. Hmmm. The Y-Pipes are different and the silicon pipe is different too. The Silicon pipe is a 45 degree angle for the Foz and 90 degree angle from the Impreza...
I now know there is a different alloy Y-Pipe made specifically for the SG9 STi Foz.
Comparison pics:
Intercooler with Foz Y-Pipe and Foz Silicon.
Intercooler with WRX STi Y-pipe and WRX STi silicon.
Impreza STi left and SG9 STi right:
Pipes are at different angles too as you can see in the next pic. So I was a bit worried that the angles of the pipes were designed different so that the Y-pipe clears the Pitching Control Rod.
I tried a test fit using the WRX STi Y-pipe and silicon and it fits perfectly and clears the Pitching Control Rod too.
So I left it on the Foz until I get a new one from Japanparts.com