This is a stock diameter harmonic balancer for the LS3 engine. It is a steel unit with a black oxide finish and is internally balanced to match LS3 and related GM LS-Series applications.
Specifications:
- Harmonic Balancer
- Stock Diameter
- Steel
- Black Oxide
- Internal Balance
- LS3
- GM LS-Series
- Sold as: Each
- Part number: 12674582
Applications:
- GM LS-Series engines (LS3), internal balance
FAQ
Is this balancer internally or externally balanced?
It is internally balanced, matching the LS3 rotating assembly.
What diameter is it?
It is a stock diameter balancer.
What is the finish?
The steel body carries a black oxide finish.

