Todays update : The heads on the ZZ572 has the standard amount of boltholes to fasten the manifolds, but also two additional boltholes exist on the heads. I want to utilize the additional holes so I drawed the exhaustmanifoldflange in Autocad with the additional holes, and got a local shop to lasercut the flanges for me.
We cut a thin piece first to see if the flange aligned correctly, and it did, tomorrow I will order the finished flanges in 12mm 316 grade steel
Autocad drawing :
Test flange :
