MAHLE Performance Gas Nitride Steel Top Compression Ring 4.130in Bore .043in
⚠ Call for Availability
This item may be on backorder. Please contact us to confirm supplier availability and estimated lead time before ordering.
Regular price
$266.95
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.
Open-stock top compression ring for 4.130in bore, .043in axial height, from the MAHLE Performance ring range. It is built from gas nitrided stainless steel.
Key Features
- Barrel face profile for fast break-in and continued cylinder wall contact as the piston rocks at TDC and BDC
- Gas nitrided stainless steel gives the ring additional surface hardness and scuff resistance, which MAHLE positions above PC479 for high-end power adder work.
Product Details
- Brand: MAHLE Performance
- Product type: Top Compression Ring
- Bore diameter: 4.130 in
- Axial height: .043in
- Radial wall thickness: .157 in
- Base material: Stainless steel
- Face coating: GNS
- MAHLE ring type: BR-12NG
- Position: Upper compression ring (top)
- Manufacturer Part Number: 301-1187
Shipping Height: 3.25
Shipping Length: 5.0
Shipping Width: 5.0