TWIN AIR Replacement Backfire Filter 153911FR Billet Exhaust Tips The inter core tube is

The inter core tube is made of stainless that slips over the entrance and into the exit cap that has a 60* slash cut tube covered with a Carbon Fiber beauty cover

Honeycomb mesh

Just what your CBR 1000 rr needs to clean up the tail section from Gravesport

When removing the OEM fender assembly our kit includes swing arm blocks for proper setup

TWIN AIR Replacement Backfire Filter 153911FR Billet Exhaust Tips The inter core tube isDual bonded foam design filters out even the smallest dirt particles, while allowing more airflow than two separate layer filters (flow bench proven)Twin Air filters are slightly smaller than stock to make them easier to change and to increase dead air space around the filter for better performance Flat foam sealing ring securely seats against the airbox, even in the worst riding conditions