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Just got them today. I got an extra set listed on the 60V6 store, at 355 plus shipping. I was one of the first to get these so if you want a set, I wouldn't wait long. I can try to get more if there is demand. I also have the rocker arm studs needed fo these if you have 03+ heads. No guide plates are available for the 3500 heads and these will not work with the 3900 heads.