Stage 2 is the one that requires some Hardware mods, its the next step up for those that just want a little bit more and even some more engine roar from intake as this will be complemented with a different intake solution, again the gain we observed with this over the stock air box is noticeably better all across the rev range and we only use high quality air filtration systems we developed together with ITG (https://www.itgairfilters.com)

Dyno testing before and after are also a part of this service

you can see gain on pictures bellow stage 1 vs stage 2