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The Mahle piston ring set identified by manufacturer part number 3932MS-112-4 is designed to seal combustion pressure, control oil, and transfer heat when matched to the exact piston grooves and finished bore. Final compatibility depends on the complete engine combination and measured dimensions, not the product title alone.
Key Features
- 1.0mm, 1.0mm, 2.0mm Standard Tension +.005 File Fit Rings 3.927"+0.005 1.0, 1.0, 2.0mm 4cyl File Fit Rings.
Fitment
| Fitment Status | Universal only by exact ring and piston dimensions |
|---|---|
| Required Verification | Bore, ring-groove dimensions, ring thickness, cylinder count, material, and intended use |
Specifications
| Brand | Mahle |
|---|---|
| Manufacturer Part Number | 3932MS-112-4 |
| Product Type | Piston Ring Set |
| Fitment Type | Universal |
| Condition | New |
| Manufacturer Guide Match | Current part number, verify against latest MAHLE catalog |
| Bore Diameter | 3.927 in |
| Ring Preparation | File fit |
What's Included
One new Mahle piston ring set in the exact configuration stated in the specifications. Pistons and installation tools are not included unless explicitly listed.
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 4.030in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings
- Mahle MS 4.070in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings
- Mahle MS 4.080in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings
Frequently Asked Questions
How do I confirm Mahle 3932MS-112-4 is the correct ring set?
Match the finished bore, piston groove dimensions, top, second, and oil-ring thicknesses, cylinder count, and intended engine use. A matching bore alone is not enough.
Do these piston rings require filing?
The listed preparation is File fit. Measure every ring in its assigned cylinder and follow the current MAHLE instructions for the bore, fuel, boost, heat load, and intended use.
Can piston rings be installed without measuring the cylinders?
No. A qualified machine shop should measure bore diameter, taper, out-of-round, surface finish, piston groove clearance, ring end gap, and oil-ring fit before assembly.
Installation Instructions
Use the current Mahle instructions for part number 3932MS-112-4 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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