These are POLY motor mounts that fit 2001-2006 GM 2500/3500 8.1L trucks including Silverado, Sierra, Yukon XL, and Suburban. They are a direct bolt up using factory hardware. These use a polyurathane bushing with a 9/16″ bolt to allow the engine and frame to rotate relative to each other reducing vibration and loading. These are laser cut 3/16″ steel fully MIG welded. All brackets will ship raw ready for your paint or painted black. They match factory measurements so the engine remains in the same location as stock. Sold as a pair.