2 1/4" Round, GM Big Block Chevy, OEM - Stock Port Location, 4.84" Bore Space, 3/8" Thick, CNC Machined Header Flange. Available in mild steel or stainless steel.
**2 flanges are needed for a full set**
- Diameter:
- 2 1/4"
- Engine Make:
- GM/ Chevy
- Engine Family:
- Big Block Chevy
- Cylinder Head/ Engine:
- OEM - Stock Port Location
- Port Shape:
- Round
- Thickness:
- 3/8"
- **Full Set:
- 2 Required