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MAHLE 3021258 Performance Napier Piston Ring Set Bore - THM-13 4.180

Manufacturer

Picture for manufacturer MAHLE

Part Number

3021258
11 reviews
Sale Price

$39.84

Estimated ship date Saturday, November 21

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Product Details

The MAHLE 3021258 is a high-performance piston ring set designed for precision engine builds requiring a 4.180-inch bore diameter. This professional-grade ring set features Napier THM-13 configuration, engineered to deliver optimal sealing, reduced friction, and enhanced durability in demanding applications.

Key Specifications:

  • Bore Size: 4.180 inches
  • Top Ring Thickness: 0.043 inches
  • Oil Ring Width: 0.135 inches
  • Plain ring wall configuration for reliable sealing
  • Napier THM-13 design for superior oil control

MAHLE piston rings are manufactured to OEM specifications and beyond, utilizing advanced materials and precision manufacturing processes. The Napier ring design features a hooked scraper profile that provides excellent oil control while minimizing friction losses. This ring set is ideal for performance rebuilds, racing applications, and high-output engine builds where precise tolerances and maximum reliability are essential.

What's Included:

  • Complete piston ring set for one piston (compression rings and oil control rings)

These rings are designed for professional installation and require proper ring gap measurement and fitting procedures during assembly.

This site is great

In Progress ordered 6/7/16 First time order was OK

Everything was fine, but your order page would not let me chose to pay with paypal yesterday. It worked today.

Very easy ordering. That's all I know until delivery.

very user friendly web site easy to use thank you

Website was very easy to navigate.

Fast & Easy

This was the cheapest price and no one came close but delivery took forever.

Great experience so far, stumbled upon this website searching the internet for Bilstein Shocks...

good?

Quick and easy

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