Roof Rack Blanking Bolts. These blanking bolts are designed for roof rack pre-drilled holes on your van roof. For Audi A4/S4/Avant/Quattro 8K 2008 -2015. For Renault Trafic 2015 - 2024. - Essential Function: Secure roof panels firmly when installing or removing roof racks/rails, prevent roof leaks and structural loosening caused by missing bolts.
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