Since I have the front bumper off for the splitter install, and going with the Castrol brake fluid. I decided to up-grade the brake cooling ducts to a 3" hose from the Stillen 2" hose set-up.
Pic's of the 10ft, 3" diameter hose, 4" to 3" reducers. The factory carbon fiber RC brake ducts are designed for a 4" hose.
And the flanges for the brake shield.