[Rebel1]

Jason ... I've been searching for that pic of a cobra with rear brake ducting .... cant find it ... Yet.

It looked very simple ... Essentially it was a sheet metal rectangular affair which looked at first glance just like a rectangular exhaust pipe exiting in front of the back wheel. About where the side pipes turn outward but from under the car.

It was only shallow.....looked about 50mm deep but was about 300mm horizontally and was cut at an angle facing forward and it partly protruded from the side of the car a little.

What it was shaped like under the car is anybodies guess but I imagine it just channeled cool air to maybe some flex pipes which then fed air around the center of the rotors.

It looked just like an inverted scoop which drew cool air partly from the side but also from under the car.

The owner of the car only fitted them when he was competing. He removed them for street work so I guess some easy fixing like Mikes nutserts would be handy.

The owner did write that they made a huge difference to the rear braking of the car.

Feeding air to the caliper is not what you want. Remember the heat is generated at the pad/caliper interface and you wont get any air there. The rotor is a huge heat sink which converts kinetic energy to heat and it is the rotors job to dissipate that heat to the atmosphere. Thats why vented calipers were designed.

Have a look at those glowing rotors on F1 cars. Thats where all the heat is and where you'll get most improvement.

I'll keep looking for that pic.

Cheers