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Pair of GM Chevy double hump 492 heads 64cc. These heads are EXTREMELY rare. They are a matching set from the factory with 1.94/1.50. Heads are stock with all new guides, seats, & ready for screw in studs. Heads are cleaned & have been magnufluxed & ready to bolt on. I have owned these heads for 40 years and are perfect. Purchase for your race car or restoring an old car.High horse power heads with accessory holes. If you can even find a pair of these heads they are going for thousands of dollars Won't last long at this price.Shawn 813-270-1098.