12018AB550 Subaru PISTON SET LH OS0.25, Price: 43.66$, Weight: 0.477kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Subaru |
12018AB550 |
PISTON SET LH OS0.25 |
0 |
0.477 |
7-10 |
43.66$ |
| Not Available | ||||||
Originals
Compatibility
| Body | Engine | Vehicle Grade | Market | Model Year From | Train | Gearbox | Diagram |
|---|---|---|---|---|---|---|---|
| XUV(CROSSOVER 7) | 2.5L EMPI DOHC NA | X-BREAK | Japan | 02.2017 | ﾌﾙﾀｲﾑ4ﾘﾝｸﾄﾞｳ | ﾄﾙｸｺﾝﾊﾞｰﾀｼｷｼﾞﾄﾞｳﾑﾀﾞﾝﾍﾝｿｸｷ | View |
| Body | Engine | Vehicle Grade | Market | Model Year From | Model Year To | Train | Diagram |
|---|---|---|---|---|---|---|---|
| WAGON | 2500CC EMPI DOHC NA | X LTD PLUS | USA | 05.2011 | 11.2012 | FULLTIME 4WD | View |
| Body | Engine | Vehicle Grade | Market | Model Year From | Model Year To | Train | Diagram |
|---|---|---|---|---|---|---|---|
| OUTBACK | 2500CC EMPI DOHC NA | 25I-PLUS | USA | 03.2013 | 05.2014 | FULLTIME 4WD | View |
LH 0.25 Oversize Piston Kit for Subaru Boxer Engines 🛠️
This left-bank oversize 0.25 piston kit restores compression and smooth running after cylinder wear or a rebore/hone. Built from high‑silicon aluminum alloy with low‑friction skirt coating, it keeps cold start slap down and stabilizes temperature expansion. Ideal for professional rebuilds where standard size can no longer seal correctly.
Why you need it
When the cylinder is machined +0.25 mm, a matching piston is required to achieve correct clearance, ring seal, and oil control. It brings back power, lowers oil burn, and reduces noise.
How it works
The piston converts combustion pressure into crank rotation via the wrist pin and connecting rod. Precision rings seal compression, scrape excess oil, and transfer heat to the cylinder wall for cooling 🔥➡️🏁.
If the piston is damaged or worn
Expect hard starts, loss of power, blow‑by, blue smoke, higher fuel use, and knock. Severe scuffing can seize the engine and harm the catalyst ⚠️.
Tech notes
Install only in a properly measured +0.25 mm bore. Check ring gaps, orientation, pin fit, and left‑bank placement. Always match weight across cylinders and follow break‑in.
Compatibility
- Forester
- Legacy
- Exiga