first i do have a couple more pics of the brackets themselves i just have to find them. they do not leak when they are closed at all, dmh valves are a great product. the wires were the easiest part, i just ran them up through my engine bay, then into my ecu box, then under my dash to the ignition connector, then ground wire, then mounted the switch on the plastic panel under my dash.
oc avant just asked for a detailed write up so im in work on that as well. as far as dyno numbers go i really dont dyno my car so i can only show track times/fats times. i think they would also work good in front of the first muffler.
there is hardly any room under the car right after the flex joint and especialy tough to fit in front of the stock cats. i found this was the only way to fit them in there, but if your wondering about flow compared to the regular cutout design, they flow just as good and releive all back pressure.
hopefully that helped you out a little bit until the write up.
dan
2000 s4 jhm/vast stg gt
2001.5 a6 4.2(in work)