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MAHLE 3021256B Performance Piston Ring Set Napier Bore - THM-13 4.125

Manufacturer

Picture for manufacturer MAHLE

Part Number

3021256B
11 reviews
Sale Price

$6.89

Estimated ship date Saturday, November 21

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Product Details

The MAHLE 3021256B is a high-performance piston ring set engineered for precision and durability in demanding applications. This Napier THM-13 design ring set is specifically manufactured for engines with a 4.125-inch bore diameter, delivering reliable sealing and optimal combustion efficiency.

Key Specifications:

  • Bore Size: 4.125 inches
  • Top Ring Thickness: 0.043 inches
  • Oil Ring Thickness: 0.135 inches
  • Configuration: Plain ring design with RW (rectangular wire) oil ring
  • Performance-grade construction for enhanced durability

MAHLE piston rings are manufactured to exacting OEM standards using premium materials and advanced coating technologies. The Napier THM-13 profile provides excellent oil control and reduced friction, while the plain ring design ensures consistent sealing across the entire bore surface. This ring set is ideal for performance builds, rebuilds, and racing applications where reliability and power are critical.

I like that you can complete the order through Amazon.

quick and easy

Great price and easy payment method.

Pretty convenient thus far, barring any unforeseen issues!

website is a lil funky sometimes

it was good

had the part I needed at the most competitive price and easy to find/purchase from their site.

very great price

Great

great prices!

I ordered the part from Autoplicity and it arrived in time and is a great product<br>

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