| Part# 13040MO9550 Specification: - Piston measures 3.757 Finish bore is 3.759
- Compression 630.
- Weighs 184 grams.
- 2.5 to 3 thou Piston to wall clearance
- Top ring groove .050
- Bottom ring groove .080
**Measurements are done with our Micrometers** Parts: - Piston
- .590 BY 2.365 long wrist pin
- 2 wire locks
- Complete Ring Kit, 9550XS
- 2 Ring Groove Piston.
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