I dont know what u mean by new or old model, but its a current model... its not the graphic lcd screen one.. if thats what you are asking... heres a link to it on their website
http://www.gtechpro.com/gtechpro.html
cheers...
alex
well my bro had it on his r33 gts... it fits perfectly, he got EPA'd and was wayy under.. i think it was 85Db... and non turbos are supposed to be louder i think...
yeh my left hand rocker had really loose screws aswell!! how strange... i got leaks out the back and am currently changing the rubber plugs at the back.. .hopefully should fix my leak damnit!