Specifications
- Brand
- Mahle
- Part #
- 4325MS
- UPC
- 4325MS

Mahle MS 4.320in+ .005in 1/16in 1/16in 3/16in File Fit Rings
$118.05
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Mahle MS file fit piston ring set for 4.320in bore engines. Features 1/16in, 1/16in, and 3/16in ring sizes.
Key Features
- Fits 4.320 inch bore engines.
- File-fit design allows for custom gapping to your cylinder bore.
- Includes 1/16 inch top compression ring, 1/16 inch second compression ring, and 3/16 inch oil control ring.
- Standard tension rings suitable for many engine applications.
- +.005 inch sizing for honed or bored cylinders.
- 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
Mahle is a well-known name in engine components, often chosen for their reliable parts. This set of MS series piston rings is designed for engine rebuilds where precise fitment is key. These are file-fit rings, meaning you'll need to gap them to your specific cylinder bore size during installation, which is a common practice for performance or custom engine builds.
This particular set is for a 4.320 inch bore and includes rings with dimensions of 1/16 inch for the top two rings and 3/16 inch for the oil ring. The +.005 inch sizing indicates they are intended for a slightly larger bore than standard, often used when cylinders have been honed or bored out. The standard tension design works well for a wide range of applications.
Keep in mind that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for proper installation and gapping procedures.
Specifications
- Brand
- Mahle
- Manufacturer Part #
- 4325MS
- UPC
- 4325MS
Frequently Asked Questions
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Mahle MS 4.320in+ .005in 1/16in 1/16in 3/16in File Fit Rings




