Specifications
- Brand
- Mahle
- Part #
- S42170-020
- UPC
- S42170-020

Mahle MS Cummins B 5.9L (+020) Diesel Ring 1 cyl
$36.43
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Mahle B 5.9L diesel piston ring set. For 12V/24V engines.
Key Features
- This product is a single cylinder piston ring set.
- The set is sized 0.020 inches larger than standard.
- Designed for Cummins B 5.9L 12V and 24V diesel engines.
- 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
What you get here is a single cylinder piston ring set from Mahle, specifically for Cummins B 5.9L diesel engines. This set is sized 0.020 inches larger than standard, which is important if you're rebuilding or re-ringing your engine and need to account for cylinder bore wear.
Mahle is a well-known name in engine components, and these rings are built to meet the demands of a diesel engine. They're designed to seal the combustion chamber effectively, which is key for getting good compression and preventing blow-by. Proper ring seal means your engine will run more efficiently and produce the power it should.
Keep in mind that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's service manual for the correct installation procedures and specifications when rebuilding your engine.
Specifications
- Brand
- Mahle
- Manufacturer Part #
- S42170-020
- UPC
- S42170-020
Frequently Asked Questions
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Mahle MS Cummins B 5.9L (+020) Diesel Ring 1 cyl




