Part# 12258MO8291: Specifications: - Piston measures 3.259.5. Finish bore size is 3.263
- Compression 595
- Weighs 183 grams
- 3.5 to 4 thou piston to wall clearance.
**Measurements are done with our Micrometers** Parts: - Piston
- 2.075 length wrist pin. HD
- Complete Ring Kit 3.268XC
- Support Ring GLS31
- Spiral locks.
- 2 Ring Piston.
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