This is a BMC race filter with a K&N stacked and air dam fitted. It works well with richer jetting with no flat spots on my machine. It did drop the mpg to 33 and made little if any more HP. So I will trade it for the part of the left fairing I posted in classifieds. The K&N is sourced from a Suzuki GSF1200 and is glued in place with silicone.