Block: LD9 2.4L
Found in:
- 1996–2002 Cavalier Z24
- Pontiac Sunfire GT
Notes:
- Stronger bottom end than 2.3
- Oiling improvements
- Ideal hybrid base
Head: 086 HO Head
Found in:
- 1990–1992 Olds Calais Quad 4
- Beretta GTZ
Casting ID:
"086" (visible on head)
Notes:
- Best flowing OEM Quad 4 head
- Required for max NA power
- Supports aggressive cams
Why This Combo?
- LD9 bottom = strength
- 086 head = airflow
Result:
Best hybrid Quad 4 setup possible