Quote Originally Posted by Phantom View Post
I know that ZZP has the brighter reverse lights but I do not have the part number. The upgraded bulbs just have two filaments that both come on instead of one. These bulbs can be made if you cant find them, to make them find one that has the same base and two filaments. There will be two sets of leads one for each filament you will need to modify the secondary lead so it is connected to the first one this will have both turn on and be brighter.
They are 3457's. They are dual filament bulbs. Both filaments turn on when in reverse, thus being brighter than the stock 3057. I use 3457's in my reverse lights with no issues. Here is a thread about the silverstar reverse lights.

Osram Night Breaker & Silverstar Reverse Bulbs - LS1TECH