RockTrix for Precision European - 2pc 2" Thick 8x6.5 Wheel Spacers with 14x1.5 Studs (Fine Threads) for many Chevy Avalanche Silverado Suburban, GMC C2500 C3500 Sierra Yukon Hummer H1 H2 8x165.1 [APPLICATIONS] Can fit on Cadillac, Chevrolet, GMC, & Hummer vehicles with 8x6.5" (8x165.1) Bolt Pattern. See Description to see exact Year/Makes/Models. Do this prior to placing your order to prevent fitment problems. [IMPORTANT FITMENT INFORMATION] 1) Measure wheel gap for clearance. You will need at least 2.0" (50mm) of fender clearance to prevent the wheel/tire from hitting the fenderliner. 2) Measure your vehicle's wheel studs. It must be less than 2.0" (50mm). 3) Check the thread size of your vehicle's wheel studs. It must be 14x1.5. [SPECIFICATIONS] Set of 2. 2.0" (50mm) Thickness | 8x6.5" (8x165.1) Bolt Pattern | 117mm Hub Bore | 14x1.5 Threaded Studs/Nuts [MANUFACTURING] CNC Machined to exact specifications from Aerospace Billet Aluminum. Undergoes anodizing process to prevent corrision. Includes pre-installed heat treated 10.9 grade studs. [PRODUCT BENEFITS] Gives your vehicle a more aggressive stance. Improves handling characteristics and stability. Fixes brake caliper clearance issues. Increases tire clearance to allow installation of wider wheels and tires.