Early filter before fuel pump-pre 1985+- IIRC.  You can run both like I do in my 84.

YMMV,

Mr. BZ-already had the small-added the big later

On Nov 17, 2010, at 4:49 PM, Harry Hoffman wrote:

> Hi All,
> 
> So, I replaced the "main" fuel filter on my vanagon. It's a large cone
> shaped bosch fuel filter that is inline after the fuel pump.
> 
> On every diagram in the Bentley for 1980-1991 I see a small box shaped
> fuel filter in between the tank and the fuel pump. I don't have this
> filter. Am i missing it or is there a difference in the 89 GL wolfsburg
> editions?
> 
> Cheers,
> Harry