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MAHLE 41909.040 Complete Piston Ring Set +.040 Over Bore GM 6.6L Duramax

(Jeep Wrangler 2012-18, Wrangler JK 2018; Chevrolet Silverado 2500 HD 2001-10, Silverado 3500 HD 2007-10, Express 3500 2006-10 + 13 more models)

Manufacturer

Picture for manufacturer MAHLE

Part Number

41909.040
10 reviews
Sale Price

$219.78

Estimated ship date Friday, November 20

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Product Details

The MAHLE 41909.040 Complete Piston Ring Set is a +.040" overbore replacement ring set engineered to restore factory performance on the GM 6.6L Duramax diesel engine. Manufactured to OEM specifications, this full 8-cylinder kit delivers the precision fit and long-term durability expected from MAHLE, one of the world's leading OE engine component suppliers.

Key Features:

  • +.040" Overbore Size: Designed for engines bored and honed to +.040" (4.0945" bore diameter) — intended for use after machine work is complete
  • Pre-Lapped Rings: Rings arrive pre-lapped for immediate seating without requiring a dedicated break-in period
  • Plasma-Moly Top Ring: Ductile iron top ring with plasma moly coating for superior wear resistance and cylinder sealing
  • Chrome-Faced Second Ring: Cast iron second ring provides excellent compression backup and oil control
  • 3-Piece Stainless Oil Ring Assembly: Stainless steel oil ring assembly ensures consistent oil control and long service life
  • Ring Thickness: 3.0mm top / 2.0mm second / 3.0mm oil (standard tension)
  • Complete 8-Cylinder Kit: Includes top, second, and oil ring assemblies for all eight cylinders — everything needed for a full engine rebuild
  • OEM-Grade Quality: Built to OE standards to minimize friction, reduce oil consumption, and extend engine life

The MAHLE 41909.040 is the correct ring set for engines that have been machined to a +.040" overbore. Verify your final bore dimension and check ring end-gaps prior to installation. MAHLE piston rings are recognized industry-wide for advanced technology driven by OE development requirements, delivering reduced friction, minimized ring mass, and lower engine oil consumption.

Products specifications

Fits

Jeep Wrangler 2012-18, Wrangler JK 2018; Chevrolet Silverado 2500 HD 2001-10, Silverado 3500 HD 2007-10, Express 3500 2006-10, Express 2500 2006-10, Silverado 3500 2001-07, Silverado 2500 HD Classic 2007, Silverado 3500 Classic 2007 + 9 more models

Piston Ring Size

.040IN

Order took a few days to ship but when it did it arrived fast.

Very easy & fast to use, and GREAT products.

It was a easy transaction and shipping was pretty fast. Very happy with this company, and will order again!!! ( actually already have)

Good so far...

Shipping was fast and without damage and the price was great.

The site was super easy to use and had exactly the product I needed.

did not have accurate pictures for product so have to go off of part number only product came on time and as expected at good price

Great product at the lowest price on he web. Fast shipping as well. Will be doing business with again. - Adam

Great Experience

Extremely fast shipping. I received my parts less than 48 hours after ordering! I will definitely keep Autoplicity in my favorites!

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