Made this for Beefy on here today. Started off with a standard heater vent surround, a day later ended up with a boost guage mounting pod.
First off i used a dremel to cut away excess plastic, then glued a plastic square in the space where the vent used to be.
Next up was to use p20 fibreglass to stiffen the plastic square.
I then reinforced the front with glass matting and fibreglass.
Applied a few thin layers of filler sanding in between, followed by primer.
Cut a hole for the guage.
Gloss Black Paint.