[aerohead]

My thought is that since it's Mugen,it was built for "performance".Since it has no up-sweep it should not induce drag and my guess is that they're using it to move the low pressure wake underneath it to create a little downforce,without the drag penalty.Since it increases the fineness-ratio a tad that's also not bad.It's a perfect fit,it doesn't block your vision,could show a smidge better on fuel,I'll vote,keep it!