I used the Stillen brake duct kit from the rotors to the front. I was lucky enough to get real Nismo RC brake ducts. But you can get other ducts now. To reduce from the 3" duct to 2" hose. Use a reducer.
https://www.facebook.com/groups/2321...7200413662263/
https://www.facebook.com/finiteelementdesign/?fref=ts
Dust collection reducer 3" to 2". Cut it down to fit. And glue into place.
https://www.cpooutlets.com/jet-41482...SABEgJRwPD_BwE