Up for sale is an adjustable Dual Port Blow Off Valve, brand new in box available in Blue, Black, and Red exactly as shown on the picture. These units are fully customize-able and are 3-in-1 in terms of functionality. They could be run as:

 - Fully venting off to atmosphere (a.k.a SuperSonic) 
 - Fully recirculating like a diverter valve, except still make the sweet BOV sound (a.k.a PlumBack)
 - Half & Half (a.k.a 50/50)


The kit comes with a direct bolt on fit flange adapter (i.e. plug and play, no welding required) for the following vehicle makes & models: 


Mazdaspeed 3 2007-2013 
Mazdaspeed 3 2010-2013 BL series, but will require an aftermarket airbox to have room for the BOV to fit too.
Mazdaspeed 6 2006-2007
Mazda CX7 2.3L 2006-2012


These units are also adjustable by twisting the top cap clock-wise, and counter clock-wise to control the degree of vent off for fine tuning and getting the most out of the BOV based on any individual's preference.