It's a subwoofer port tube. I got it on ebay about 6 years ago - there might still be a similar one.
I can measure it if you like. It's pretty much the perfect size to fit in the headlight bucket - needs trimmed around the core support a bit and I filed the corners of the headlight bucket some as well (using an old Depo bucket, not my original Hella's lol!).
I can measure it if you like. It's pretty much the perfect size to fit in the headlight bucket - needs trimmed around the core support a bit and I filed the corners of the headlight bucket some as well (using an old Depo bucket, not my original Hella's lol!).