2pc 1.25" Black Wheel Adapters 5x4.75 to 5x4.5 (CHANGES BOLT PATTERN) with 12x1.5 studs for many Chevy Camaro Corvette S10 GMC Jimmy S15 Pontiac Firebird GTO Trans Am (5x120.7 to 5x114.3 Spacers) [CHANGES BOLT PATTERN] These Adapter Spacers will only work for you if your vehicle is 5x120.65 or 5x4.75 bolt pattern AND your wheels are 5x114.3 or 5x4.5 bolt pattern. See description for other important information. [APPLICATIONS] Buick, Cadillac, Chevy, Chevrolet, GMC, & Pontiac vehicles with 5x120.65 or 5x4.75 Bolt Pattern and 12x1.5 Threaded Studs [SPECIFICATIONS] Pack of 2. 1.25" (32mm) Thickness | 73.1mm Hub Bore | 12x1.5 Threaded Studs/Nuts [BOLT PATTERN INFORMATION] 5x120.65 or 5x4.75 Vehicle Bolt Pattern | 5x114.3 or 5x4.5 Wheel Bolt Pattern [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.