They arrived fast and look terrific, these are second set of Allied LS heads and I'll order again. Only feedback I have is one head arrived with 2 exhaust bolt holes drilled and tapped oversized. Understandable. I sourced 2 matching bolts of the larger size but they stripped with reasonable tightening. I repaired them with helicoils easy enough. No sweat.
My feedback is a helicoil would probably be a stronger repair, vs tapping already damaged bolt holes from an M8 to a slightly larger 3/8" hole, and would allow you to use all the same size exhaust bolts.
