12 Bolts Polished Aluminum Differential Rear Cover Fits for GM Chevy C10 8.75" Truck 45787937Polished Aluminum Differential Cover Rear 12 Bolt Truck 8. 75" RG Specifications: Type: Differential Cover Placement on Vehicle: Rear Finish: Polished Material: Aluminum Bolt Included: 12 Bolts Drain Plug Included: Yes Gasket Included: Yes Extra Fluid Capacity to Aid in Cooling 12 Bolt 8. 75" (8 3 4") Ring Gear C10 K10 Blazer Surburban Cast with Thick . 300 Aluminum Flanges to Prevent Warpage. Note: This cover is extra capacity so it is thicker than