I decided to lose the stock ducts a while back. Mainly when I put on the s5 bumper. I didn't have the stock s5 brake ducts but no sweat, I decided to make due with some larger ones. The first pic is of the 3 inch hose I used. I decided I didn't like that enough so I went to a 4 inch to take maximum advantage of the space I had available. I will be installing s5 fogs soon but I will be placing them where I want and they won't block much of the duct. The last pic shows the direction that its facing, it looks like its not pointing at the brakes but it is.

Chris

 

that looks way more effective than the stock ones

 

It has to be. I'm not sure about the actual dimensions of the stock ones but I'm pretty sure they're not as large as these. And I placed them to have more of an angle to focus on the caliper and rotor. Of course this only works because I have no charcoal can and some other **** ripped out of there.

Chris