The red stripes on top of the fenders are double sided tape. My only complaint is that the double tape didn't stick to the wing wall. The tape is there because there are no holes on the truck at those locations (it's not Husky's fault but I didn't expect to have to double tape or drill holes, hence the 4 star rating instead of 5). Husky also offers two mounting screws that you can use if you want to drill mounting holes. At least one other option was provided; However, I didn't like the idea of drilling holes in my new truck, but I felt like I did, and it ended up being a perfect fit. They fit perfectly on my 2015 Silverado 2500 HD.
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