When I did the slide topper on are's the factory drip rails weren't long enough for the toppers and did not make enough angle for water to run off so I add new rails about 2" above them.
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Bob & Carol Washington St
2017 HC HM352RL 2018 Dodge 3500 laramie CC LB 4x4
Curt Q25 with puck system, Factory air bags
Happy Trails
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