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MAHLE 3021278 Performance Piston Ring Set Bore Steel Napier - 4.140 THM-13

Manufacturer

Picture for manufacturer MAHLE

Part Number

3021278
11 reviews
Sale Price

$42.38

Estimated ship date Saturday, November 21

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Product Details

The MAHLE 3021278 is a high-performance piston ring set engineered for precision engine builds requiring a 4.140-inch bore diameter. This professional-grade ring set features steel Napier design rings optimized for the THM-13 configuration, delivering exceptional sealing and durability in demanding applications.

Key Specifications:

  • Bore Size: 4.140 inches
  • Top Ring: 1.5mm steel Napier design
  • Second Ring: 1.5mm configuration
  • Oil Ring: 3.0mm (standard thickness) with 0.150" radial wall
  • Ring Face: Plain finish for optimal break-in

Performance Features:

  • Steel Napier top ring provides superior wear resistance and heat dissipation
  • Plain ring face allows proper seating and oil control during break-in period
  • Precision-manufactured to MAHLE's exacting tolerances for consistent cylinder sealing
  • Engineered for high-performance and racing applications where reliability is critical

MAHLE is a globally recognized leader in piston ring technology, supplying OEM and performance markets with components trusted by engine builders worldwide. This ring set is ideal for custom engine builds, performance rebuilds, and racing applications requiring precise bore specifications and premium materials.

Quick and easy.

Great prices with fast shipping will buy from again

so far so good

ok so far

no issues. good prices. The above was automatically input for me. However I don't feel as though its accurate. The part about no issues is correct buy the prices... Well the prices really weren't good. They were the best.

quick and easy

Quick easy, save money and fast shipping

GREAT COMMUNICATION FAST SHIPPING PLUS GREAT PRICES I'M SOLD

easy

Great price, fast check-out. I will definitely be adding Autoplicity.com to my shopping options for all my future truck part needs!

the amazon payment did not work; hope I don't get double billed since I went with paypal afterwards. Meanwhile, I could not verify that my amazon order is cancelled/never placed.

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