Mine cracked on a kerb, same kerb got shadys splitter lol.Got myself a genuine VR6 splitter, you can feel how soft the plastic is on the genuine. It just bends not shatter.
I will throw a spanner in the works and say my ebay special fitted fine (never popped out), had no gaps and got grazed nearly everyday and never broke! i think it's luck (like everything on the bay) as other people have had issues with the same one's!