KTM 390 / Husqvarna 401 Open Air Box Cover

Great airbox cover

Perfect fitment, upgrade flow and sound, EXCELLENT service from Coober

Coober Air box cover

So far so good. Definitely gets more air. Makes it sound better. Still pretty early to give a detailed review.

Not a good idea

My mistake. This air box lid becomes the primary filter for the bike as air seeks the path of least resistance. When riding my 390 Adventure off road it gets dirty and the foam block would be too risky to use as the main filter. As I no longer have the package and I can't return it, I have waisted some money. Live and learn I guess. It sounds great but not worth it.