The amount advertised is the amount your truck will be raised in the front, not the spacer thickness. The spacers included in the kit are designed to work with the geometry of your suspension and give you the MAXIMUM amount of lift with minimal alterations to your ride so it will NOT affect your ride quality or overextend your suspension parts.
Yes, the spacers are Teflon Coated and will never lose their finish. Anodized aluminum kits will change color over time.
Painted or powder coated steel chips, and takes out chunks of the finish. However, Teflon resists all of the elements plus gives you a hard coating that is scratch resistant and will last forever. The best way to find out which kit you need is to measure from the ground to the top center of your wheel well in the front and in the rear. Subtract the two numbers and that is the amount you need in order to level your truck. Heavy Metal reserves the right to make changes to the material, design, and specifications of the replacement item without prior notice. The item "For 2007-2020 Chevy Silverado 1500 GMC Sierra 3 Front + 3 Rear Level Lift Kit" is in sale since Thursday, September 12, 2019. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Suspension & Steering\Lift Kits & Parts".suspensions" and is located in Henderson, Nevada. This item can be shipped worldwide.