MAHLE Performance Plasma-Moly Steel Piston Ring Set 4.135in Bore
⚠ Call for Availability
This item may be on backorder. Please contact us to confirm supplier availability and estimated lead time before ordering.
Regular price
$578.47
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 complete engine ring set from MAHLE Performance for a 4.135in bore, combining 1.5mm, 1.5mm, 3.0mm top, second and CP-20 oil rings.
Key Features
- 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.
- CP-20 assemblies use a chem-polished stainless steel expander with chrome plated carbon steel rails and an exclusive 20 degree ear angle for side seal in the oil ring groove. The ChemPolish process improves oil drain back, and the design does away with wire latches and nylon blocks.
- Reduced radial wall compression rings, which lower tension against the cylinder wall and let the ring sit higher on the piston
- Standard tension CP-20 oil ring assembly, 14-18 lbs tangential
What Is Included
- Top compression ring: MAHLE 301-0983
- Second compression ring: MAHLE 302-1271
- CP-20 oil ring assembly: MAHLE 303-0320
Product Details
- Brand: MAHLE Performance
- Product type: Engine piston ring set
- Bore diameter: 4.135 in
- Ring widths (top, second, oil): 1.5mm, 1.5mm, 3.0mm
- Base material: SAE 9254 steel
- Face coating: Plasma-Moly
- Position: Oil control ring
- Oil ring tension: Standard (14-18 lbs tangential)
- Manufacturer Part Number: 315-0200.015
Shipping Height: 3.25
Shipping Length: 5.0
Shipping Width: 5.0