Yes it will help some. You can purchase split insulation hose from Home Depot or someplace like that. On a lot of car's the lines are insulated. I think the manufacturers also count on the fact that it's hose, so maybe they figure those sections won't make that much a difference. It probably won't be noticeable, in terms of mileage, but it should also help the level of cool you can get, since you won't be cooling the engine compartment, so much.
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