My first metra kit had that gap. The one I just bought has no gap at all.
2010 Focus coupe 5 speed
Projector retrofit/LED tails/ Pioneer 80prs/(2)AQ2200D/BK800.4/6 SQ pro mids/4 SQ supertweets/AlphaDamp/HDC3 18"s walled/ Juicebox G31/ DC power 270XP Alt/
A lot of mods.