Specifications
- Brand
- Mahle
- Part #
- 4380MS-15
- UPC
- 4380MS-15

Mahle MS 4.375in+ .005in 1.5 1.5 3.0 mm File Fit Rings
$179.36
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Mahle MS File Fit Piston Rings. Standard tension, 1.5mm, 1.5mm, 3.0mm ring set. Part# 4380MS-15.
Key Features
- Fits universal applications for engine rebuilding.
- Standard tension ring set with 1.5mm, 1.5mm, and 3.0mm dimensions.
- File-fit design allows for precise end gap adjustment.
- Mahle is a popular brand for engine components.
- 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
When you're rebuilding the top end of your engine and need to ensure a solid seal between the piston and cylinder wall, a good set of piston rings is crucial. These Mahle MS file-fit rings are designed for that purpose, offering a standard tension setup with specific dimensions: 1.5mm for the top two ring grooves and a 3.0mm oil ring. The file-fit design means you can precisely adjust the end gap for your specific application, which is key for optimal performance and engine health.
Mahle is a well-known name in engine components, and these rings reflect that. They are made to handle the pressures and heat inside an engine cylinder. The file-fit nature of these rings is a practical detail for engine builders who want to dial in their build; it allows for a custom fit that can improve compression and oil control. Remember, these are not CARB approved and cannot be shipped to California.
Specifications
- Brand
- Mahle
- Manufacturer Part #
- 4380MS-15
- UPC
- 4380MS-15
Frequently Asked Questions
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Mahle MS 4.375in+ .005in 1.5 1.5 3.0 mm File Fit Rings




