The 250/300R engines come with the red panels with the HP decals attached. It is 4 pieces that attach with high-tack 3M double stick tape. Once attached its not coming off without damaging the panels unless you use extreme care while doing so. We have painted them to match as well.
I removed them by see-sawing monofilament line under the raised letters (from a spare cowl insert). Then I used 3M two sided tape to install them to the painted inserts on my 300R.