I recently purchased a 2001 WRX BUG EYE and it came with a few basic modifications. I noticed this AVO pod filter and small section on the intake pipe which houses the AFM?

Was wanting to find out if its anything special of just a basic upgrade?

I haven't checked the ecu yet to see if it's tuned or anything

Running 11 psi according to the boost gauge, turbo back exhaust and that's about it

Thanks

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