MAHLE Performance Plasma-Moly Steel Top Ring 4.020in Bore 48-Pack .155in RW
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This item may be on backorder. Please contact us to confirm supplier availability and estimated lead time before ordering.
Regular price
$1,745.75
Verified Fitment & Application Support
This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.
Got Questions? Feel free to email us or call us at (503) 235-1947
Compliance & Restrictions
California Proposition 65 (Prop 65)
WARNING: This product can expose you to chemicals which is known to the State of California to cause cancer and/or reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
CARB / California Emissions Compliance
This item may be restricted in California and other regions with emissions regulations. If applicable, it is intended for
competition/off-road use only unless otherwise stated. It is the customer’s responsibility to confirm local compliance before purchase.
Orders shipping to restricted areas may be canceled.
A top compression ring from MAHLE's open-stock performance ring program, sized for 4.020in bore at 1.5mm axial height. It is built from SAE 9254 steel with a plasma-moly face coating.
Key Features
- Barrel face profile for fast break-in and continued cylinder wall contact as the piston rocks at TDC and BDC
- MAHLE combines SAE 9254 high alloy steel with a proprietary plasma face coating to extend ring life, reduce side wear and limit ring groove pound out. The smaller cross section of a steel ring also lets the top ring groove sit closer to the crown, reducing crevice volume.
- Supplied as a bulk open-stock pack of 48 rings
Product Details
- Brand: MAHLE Performance
- Product type: Top Compression Ring
- Bore diameter: 4.020 in
- Axial height: 1.5mm
- Radial wall thickness: .155 in
- Base material: SAE 9254 steel
- Face coating: Plasma-Moly
- MAHLE ring type: RF-13PF
- Position: Upper compression ring (top)
- Pack quantity: 48
- Manufacturer Part Number: 301-0507B
Shipping Height: 3.25
Shipping Length: 5.0
Shipping Width: 5.0