Description: 100% brand new and high quality Type: Ring and Pinion Material: Copper, Plastic Placement on Vehicle: Rear Features: Easy Installation Gear Ratio: 3.73 Ring Gear Diameter: 8.5″ & 8.6″ Ring Gear Splines: 30 Ring Gear Bolts: 10 1 Year Warranty Stable performance, high reliability. Unique charm, wearable, durable and undamaged. No drilling and cutting required. It is a good choice to replace the old one. Installation: For Chevy 8.5″ & 8.6″ 10 Ring Gear Bolts, 3.73 Rear Gear Ratio Package Includes: 1 x Ring 1 x Pinion Without Instruction Manual