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

Manufacturer

Picture for manufacturer MAHLE

Part Number

3021258B
9 reviews
Sale Price

$6.93

Estimated ship date Saturday, November 21

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Product Details

The MAHLE 3021258B is a high-performance piston ring set engineered with Napier THM-13 technology for demanding engine applications. Designed for a 4.180-inch bore diameter, this ring set delivers optimal sealing and durability in performance and racing environments.

Key Specifications:

  • Bore Size: 4.180 inches
  • Top Ring Thickness: 0.043 inches
  • Oil Ring Thickness: 0.135 inches
  • Configuration: Plain ring design with reverse twist (RW)
  • Technology: Napier THM-13 performance coating

Features and Benefits:

  • Premium MAHLE engineering for superior ring seal and reduced blow-by
  • Napier profile on second ring optimizes oil control and compression sealing
  • THM-13 coating provides enhanced wear resistance and low friction
  • Precision-manufactured to exacting tolerances for reliable performance
  • Plain face top ring with reverse twist oil ring configuration

This ring set is ideal for performance engine builds, racing applications, and high-output street engines where maximum sealing efficiency and durability are critical. MAHLE's decades of OEM and motorsports experience ensure this ring set meets the demanding requirements of serious engine builders.

easy as pie

ok so far

EZ

seems easy to use and competitively priced

very easy order, like the ability to use Amazon payment

Easy transaction.

fast and easy

Easy. Clear and simple.

All I can say is Wow! Great service, prices and easy returns. I got the wrong size helmet (my fault), they paid for the return shipping and refunded my money. I simply reordered and got what I wanted. Fantastic!

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