Most FoxConn fans and cooling systems were designed for as-is installations. It's odd for a mainstream system to still be using their stuff. Like I said, the only computers I know of that still use FoxConn components regularly, are the Amigas.
Chance are, you're gonna have to ditch it. The filter probably won't come off. It's hard to tell, though, as FoxConn made craploads of stuff. (Still does.)