I have the H&S and from a machinist's stand point i was disappointed. I had to clean slag and alot of burr's off of everything before i would consider installing them. I have looked at the Glacier deletes and rich's are more expensive but the quality control is much better. If you dont go with Glacier's kit make sure you get 18" of 3/4" coolant line so you dont have to plug the head. I just got back from a deployment so i was lazy and bought one just because i didn't want to go into work and make it.
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