how old is your waja? 4g18 or campro / campro cps?
if just open pod for 4g18/campro wont do..
but if cps then its another matter.. heheh..

last week my frens neo cps dynoed at rs dyno..
he just replace his air intake with open pod while most of the rest is stock including extractors..
cps on paper states its a  125ps engine right.. dyno result of cps with an open pod shows the figure of 154hp! 

ps - i'm going to speedworks this saturday.. warranty claim on my full system hotbits on my neo..