These are POLY motor mounts that fit 99-06 GM LS-equipped trucks including Silverado, Sierra, Tahoe, Yukon, Yukon XL, Suburban, Denali, and Escalade. They are a direct bolt up using factory hardware. These utilize a polyurethane bushing and 9/16″ bolt to isolate vibration from the engine to the frame while still being much stronger than factory mounts. These are laser cut 3/16″ steel fully mig welded. All brackets will ship raw ready for your paint or painted for a small fee. They match factory measurements so the engine remains in the same location as stock.