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Zetec (Black Top) Airbox

Ever since I have had my 2002 4/4  I have followed with interest various discussions on improvements to the cars performance. 

We all understand that the 4/4 is not an all out ‘Thrashmobile’ but I have always been one for getting the best out of what I already have. 

The following solution has been very satisfying and certainly appears to increase the breathing and is relatively inexpensive and retains most of the original components.

See PDF file for details.
Keith Hofgartner,
Jul 16, 2011, 3:39 PM