J1 RS style airbox lid. 
Fits all models of the MK3 focus from 1.0 to 2.3 RS. 
A direct replacement for the oe component. 
A direct fit with no modification needed. 
The finish is the same to match the rest of the engine bay plastics. 
Works with standard paper and aftermarket filters. 
Tried and tested on a modified Focus ST TDCi. 
More noise, more induction, OE+ look.