Reference Details
- Common issue
- Round-port heads replaced with standard D-port heads (e.g. 4X or 7K3) or aftermarket castings.
- Confidence
- documented
- Correct value
- 7F6
- Where to check
- Stamped on the center exhaust port bosses of both cylinder heads
Authenticity reference
Cylinder Head Casting Number
trim correctness · documented
Cars With This Authenticity Marker
1 linked car page.
1972 Pontiac
1972 Pontiac Firebird Trans Am 455 HO
455 cu in (7.5L) HO V8