12006AC370 Subaru PISTON SET OS0.25, Price: 51.96$, Weight: 0.562kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Subaru |
12006AC370 |
PISTON SET OS0.25 |
0 |
0.562 |
|
51.96$ |
| Not Available | ||||||
Originals
| Make | Number | Name | Availability | Weight, kg | Processing, days | Price | |
|---|---|---|---|---|---|---|---|
| Subaru |
PISTON SET OS0.25
|
122 |
0.646
|
2-3
|
41.26$
|
Compatibility
Oversize Engine Piston Set (+0.25)
This oversize piston set is needed when an engine cylinder has been worn, lightly scored, or re-bored during a rebuild. The +0.25 size restores correct piston-to-wall clearance, bringing back strong compression, smooth running, and clean power delivery ?.
How It Works
Pistons travel up and down inside the cylinders, converting combustion pressure into crankshaft rotation through the connecting rods. With the correct fit, the piston supports the rings to seal the chamber, control oil, and transfer heat into the cylinder wall. The oversize design matches a machined bore, helping the engine run like it should again.
Why Replacement Matters
If pistons are cracked, collapsed, or badly worn, the engine may burn oil, misfire, lose power, and develop piston slap noise. In severe cases, broken skirts or ring lands can score the cylinder, contaminate oil with metal, and lead to low compression or total engine failure ⚠️.
Key Signs You May Need It
- Low compression after rebuild inspection
- Oil consumption and blue smoke
- Knocking/piston slap when cold
- Scored cylinder walls found during teardown
Compatibility
- Impreza
- Forester