- Grade 8 bolts will not stretch when hot
- Duplex nickel finish for a superior look and corrosion resistance
- Double hex head includes 3/16 inches recessed allen head for easy installation
- Removable and reusable
- Can visually inspect; no need to put a wrench on to check tightness
- Fit type: Vehicle Specific
Stage 8 LS1 and LS6 Chevy Header Locking Bolt Kit for GM Small Block features locking header bolts for General Motors small block with 8 millimeter bolts. It includes (12 ea) 8 millimeter 1.25 X 25 millimeter 6 point bolts with a double hex head (includes 3/16 inch recessed allen head) and 12 each locking retainers and clips.