I was at the dealer today and i was talking to a sales person and they said that parts from SPT will not void the warranty but anyone know of any other companies that wont void the warranty?

Prodrive and STI.....and it completely depends on the parts.

where can i find prodrive parts. i went to prodrive.com but they dont have anything. any sites?

Distributed through selected dealerships, contact your nearest Subaru dealer.