This set of blue spacers is double the thickness of the Stern original, and picks up more light from the backbox flasher.You'll see more action around the speakers when the flasher goes off.
These are hefty, and have engraved features that bring out the light a little better.
Ideally, we'd recommend a UV flasher to make the most of this, but there are no suitable versions out there.
Tolerances are tight, so please be careful when installing.
You won't be able to use the original washers.
Please relocate the speaker capacitor to the screw stud at bottom left corner of the display.