2 1/2" Round, 18 Deg angled up, GM Big Block Chevy, Sonny's Semi Hemi, 5.00" 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 1/2"
- Engine Make:
- GM/ Chevy
- Engine Family:
- Big Block Chevy
- Cylinder Head/ Engine:
- Sonny's Semi Hemi, 5.00" Bore Space
- Port Shape:
- Round, 18 Degree angled up
- Thickness:
- 3/8"
- **Full Set:
- 2 Required