EnricoPalazzo, the airbox and snorkel does make a difference to an XR. You have an F6. Different turbo configuration so different results. This is the dyno sheet from my back to back testing with the standard airbox and snorkel and the XR8 snorkel and airbox. The red line is the standard parts, the blue line the larger diameter items. Arkayne, due to your town of residence and the high ambient temperature most of the year, it would be wise to upgrade the pipe if you are increasing boost.