i made a similar one for a corsa gsi i had mine was a 'T' piece tho took up less space and did make a difference, first time ive seen the idea for sale tho
 
What exactly is the difference it makes, sucking in more air? easier to draw the air in because of the 2 openings....more restriction as the air has to go through 2 filters?
 
What exactly is the difference it makes, sucking in more air? easier to draw the air in because of the 2 openings....more restriction as the air has to go through 2 filters?

sucks more air, more air makes the ecu add more fuel making the magic combination for combustion.
you tell us your the mechanic
 
i only ment what difference did u notice as u said you had one of these or similar on your corsa, i know how the engine works just dont think it would make any difference to air flow because of the restrictions opf drawing the air through 2 filters.
 
if the more openings you have the better then i'm gonna buy 5 air filters and bolt them altogether...then my car will be quicker than anything! fo shizzle ma nizzle

seriously...unless your truly reaching the limitations of one intake, theres not much point adding a second. on a K0x series turbo you just wont