Focus ST 2013 K&N with air box cover removed.
With air box cover on, the dump and induction sound is dampened by 70-80%… Keep cover on if you don’t want hot air in intake. Apologies for low quality video, …
With air box cover on, the dump and induction sound is dampened by 70-80%… Keep cover on if you don’t want hot air in intake. Apologies for low quality video, …