Xantia hdi 306 air box upgrade?

[boggs]

Im wondering is an xantia air box much bigger than the standard 306 air box? I recently installed a xantia air box in my 306 as the person who owned it before had a cone filter fitted so I can't compare it for size to a standard 306 hdi air box. It was a very tight squeeze the battery tray needed a bit of modification to get it to fit although this could be due to just being an awkward shape.

Thinking this could be a good upgrade?

[boggs]

Looking for a replacement filter they say they fit the xantia airbox as well as a 2.2 c5 so the air filter must be the same size/surface area? Can anyone shed any light on this?,