Vapor Lock
Ceramic Coating of Exhaust Manifold and/or exhaust pipe.
Old Car buffs have reported the results of ceramic coated exhaust manifolds has dramatically reduced the under-hood ambient temperature resulting in fewer instances of Vapor Lock.
Fuel Line & Exhaust Insulation
Theory says that if you insulate your fuel line from the heat then the fuel wouldn't be subject to the effects of that heat (vapor lock).
Example: Â http://www.heatshieldproducts.com