Specifications
- Brand
- Mahle OE
- Part #
- 3021248B
- UPC
- 027067929457

Mahle Rings Performance Steel Napier THM-13 4.135 x .043 .135 RW Plain Ring Set (48 Qty Bulk Pack)
$293.08
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Mahle OE Performance Steel Piston Rings THM-13. 4.135" bore, .043"/.135" ring sizes. 48-piece bulk pack.
Key Features
- Fits 4.135 inch bore engines.
- Top ring measures 0.043 inches.
- Second ring measures 0.135 inches.
- Features a Napier hook on the second ring for improved oil control.
- Constructed from durable steel for longevity.
- Comes in a bulk pack of 48 ring sets.
Product Details
These Mahle OE Performance Steel Piston Rings feature a Napier hook on the second ring, a design choice that helps improve oil control and prevent blow-by, especially in high-performance applications. The rings measure 4.135 inches in bore diameter with a 0.043-inch top ring and a 0.135-inch second ring, suitable for a wide range of engine builds where precise sealing is critical.
Constructed from durable steel, these rings are built to withstand the rigors of demanding engine operation. The Napier hook design on the second ring is a notable feature that aids in scraping oil from the cylinder wall, contributing to better lubrication and reduced friction. This bulk pack contains 48 sets, making it a practical choice for engine builders or shops working on multiple projects.
When rebuilding an engine, ensuring proper ring seal is paramount for performance and longevity. These Mahle rings offer a well-built solution for those seeking reliable components for their build. Please note that these rings are not CARB approved and cannot be shipped to California.
Specifications
- Brand
- Mahle OE
- Manufacturer Part #
- 3021248B
- UPC
- 027067929457
Frequently Asked Questions
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Mahle Rings Performance Steel Napier THM-13 4.135 x .043 .135 RW Plain Ring Set (48 Qty Bulk Pack)






