04-13 Chevy Silverado / GMC Sierra Hard Tri-Fold Tonneau Cover 2019+ They are NOT compatible with

They are NOT compatible with F30 sedan or other 3 Series body styles

F Series engines

but if gaps appear

You'll need stainless header bolts

Do I need to weld anything or is this purely bolt-on

04-13 Chevy Silverado / GMC Sierra Hard Tri-Fold Tonneau Cover 2019+ They are NOT compatible withHard Tri Fold Tonneau Cover Three panel hard tonneau with a low profile fold design that stacks neatly against the cab. Hard panel construction delivers weathertight coverage and a locked bed. Designed for DIY installation with basic hand tools. Ships from FL Warehouse Factory Mounting Points In House Quality Check Key Features Three independent panels Each folds separately, so you can access the bed without removing the whole cover. Low profile