This is an aluminum Suzuki Hayabusa cylinder head that came in for cleaning & rebuilding. We replaced all eight intake valves as well as all eight exhaust valves as the original ones were worn & pitted on their faces. We machined the surface on our Rottler multipurpose cnc milling machine with an RA finish acceptable for mating to the MLS head gasket. To the naked eye the surface of the head has a rainbow mirrored finish.
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