I've done many of these carb spacers all the way from the high dollar name brands down to the mystery no name generic ones, and many different combinations of them to dial them in for the application I'm using them with.
And NONE of them are perfectly flat coming out of the box. Run a quick file over them to knock down the high spots and she'll seal right up for you, for years to come.
Hope that helps.
Ещё видео!