
Specifications
- Brand
- Mahle
- Part #
- 3937MS-15
- UPC
- 3937MS-15

Mahle MS 3.937in / 100.00mm 1.5mm 1.5mm 3.0mm Drop-In Rings
$158.86
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Mahle MS 3.937in / 100.00mm 1.5mm 1.5mm 3.0mm Drop-In Rings Ring Set
Key Features
- Fits a 3.937 inch (100.00mm) bore.
- Includes 1.5mm top ring, 1.5mm second ring, and 3.0mm oil control ring.
- Standard tension rings for reliable sealing.
- Drop-in design for straightforward installation.
- Mahle brand offers a solid option for engine rebuilding.
- Not CARB approved; cannot ship to California.
⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more
Product Details
This is a Mahle MS piston ring set, designed for a 3.937 inch (100.00mm) bore. It features a 1.5mm top ring, a 1.5mm second ring, and a 3.0mm oil control ring, all with standard tension. These are drop-in rings, meaning they are intended to fit directly into the piston grooves without modification, simplifying the rebuild process.
Mahle is a well-known name in engine components, and this ring set is built to meet the demands of an engine rebuild. The specific ring dimensions are crucial for proper sealing between the piston and cylinder wall, which directly impacts compression, oil consumption, and overall engine performance. Using the correct ring set ensures that your engine can achieve optimal power and efficiency after being rebuilt.
Keep in mind that these rings are not CARB approved and cannot be shipped to California. Always refer to your vehicle's specific service manual for detailed installation instructions and specifications.
Specifications
- Brand
- Mahle
- Manufacturer Part #
- 3937MS-15
- UPC
- 3937MS-15
Frequently Asked Questions
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Mahle MS 3.937in / 100.00mm 1.5mm 1.5mm 3.0mm Drop-In Rings




