Looks like my gasket i took off. Why make them out of such poor quality materials, or is it a case of all the galleries too close to the bores. Why not make them out of good old copper. As ive taken my heads off 4 times i always put a little copper grease on the manifold bolts to stop them snapping off the next time it comes off, also did the same to those little barstools that hold on the heat shield. Also replaced with large 10mm head bolts with new washers. Heat tape is ok but you have 2 expansion pipes to cover/not to cover
The 90 deg turn is a pain on the head bolts. There is a new digital box ive seen on the bay of pigs that measures torque and angle turned for 50 quid. 1/2 inch either side.