Someone once posted on here ‘gases don’t like to go around corners’. Damn.
http://imageshack.us/a/img248/1152/12672101511710997429557.jpg
http://imageshack.us/a/img841/3230/57893910151171099467955.jpg
Yes but they look like they are tying to makw that one runner longer to equal the back pressure on that cylinder to match the others. One one picture shows up looks like ya posted two. By the looks of these there is no need for headers and other then removing the cat your not going to make much more power with headers. Its got independent runners for each port with an equal length runner. Thats a stock manifold that they put some time into. Its even better then the rs4 try y manifolds
Even though the pipes are dimpled?
To get the ultra definitive story you would have to see if thr dimple actually impacts in the runner. You can see each runner is on its own so impact will be reduced. In the back after the cat you can see a second dimple. That looks like it isnt intruding on the inside.
The dimples look like they are intended to be as minimal as possible. Most manufacturing dimples are large to rule out error amd to give more play. These seem to be smaller then normally seen and they are not fully impacting the runners. Its on the higher pressure side. This can be both good and bad maybe we can get some pictures showing if the dimples effect the flow path inside the pipe. Even if it does the desingn concept is using performance principles mixed with production fitment. Much like the rs4. We saw the rs4 picked up almost zero hp with headers this looks like the same story here.
I’m not referring to the runners. The 90degree turn necessary due to the space constraints similar to in the s5…further down the downpipe right by the cat.
http://i375.photobucket.com/albums/oo193/sakimano/57893910151171099467955_zps6099c354.jpg
http://i375.photobucket.com/albums/oo193/sakimano/12672101511710997429557_zps80bcb1aa.jpg
That is an interesting contrast to the RS4 4-2-1 header design…
http://img20.imageshack.us/img20/6341/18084371.jpg