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The Mahle forged piston kit identified by manufacturer part number 197769205 is designed to provide the piston geometry and compression configuration for a measured performance-engine build. Final compatibility depends on the complete engine combination and measured dimensions, not the product title alone.
Key Features
- Mahle MS Piston Set Subaru FA20 TURBO 2.0L 86.5mm Bore 86mm Stroke 129.3mm Rod -8cc 10.6 CR Set of 4.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2015-2021 | Subaru | WRX | Verify engine code and measured build dimensions |
Specifications
| Brand | Mahle |
|---|---|
| Manufacturer Part Number | 197769205 |
| Product Type | Forged Piston Kit |
| Fitment Type | Vehicle Specific |
| Condition | New |
| Manufacturer Guide Match | Exact part number verified |
| Bore Diameter | 86.5 mm |
| Stroke | 86 mm |
| Connecting Rod Length | 129.3 mm |
| Compression Ratio | 10.6:1 |
| Crown Volume | -8 cc |
| Quantity | 4 |
What's Included
One new Mahle piston kit in the quantity and configuration stated in the specifications. Rings, pins, locks, and coatings are included only when expressly listed for this exact part number.
About Mahle
Mahle develops pistons, piston rings, bearings, filtration, thermal-management, and engine components for original-equipment, replacement, and motorsport applications.
Related Mahle Products
- Shop all Mahle products
- Mahle MS Piston Set Subaru FA20 TURBO 86mm Bore 86mm Stroke 129.3mm Rod -8cc 10.5 CR Set of 4
- Mahle MS Piston Set 2010+ VW TSi 2.0L 82.5mm Bore 92.8mm Stroke 144mm Rod -7cc 9.5 CR Set of 4
- Mahle MS Piston Set Ford 2.0L EcoBoost 87.5mm Bore 83mm Stroke 156mm Rod -7cc 9.3 CR Set of 4
Frequently Asked Questions
Will Mahle 197769205 fit my 2015-2021 Subaru WRX?
That vehicle range is listed, but piston compatibility also depends on the exact engine code, finished bore, stroke, connecting rod, wrist pin, cylinder head, and compression target. Confirm every build dimension before ordering.
Are rings, pins, and locks included with this piston kit?
Included hardware varies by exact part number. Confirm the current MAHLE package contents before assembly and do not assume components from a similar piston kit are interchangeable.
What must the machine shop measure before final assembly?
Verify finished bore, piston-to-wall clearance, ring end gaps, deck height, piston-to-valve clearance, wrist-pin fit, bearing clearances, and final compression ratio for the intended fuel and power level.
Installation Instructions
Use the current Mahle instructions for part number 197769205 and the engine builder's measured assembly specifications. A qualified machine shop must verify bore finish, clearances, ring gaps, pin fit, lock installation, orientation, balance, deck height, valve clearance, compression ratio, lubrication, and break-in before operation.
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