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MAHLE 4040MS 4.040" Bore Piston Ring Set 1/16 1/16 3/16

Part of: MAHLE Piston Ring Set Bore

Other options in this family: MAHLE 8350MS-12 MAHLE 8700MS-12 MAHLE 9950MS-12 MAHLE 4310MS MAHLE 8800MS-12

Manufacturer

Picture for manufacturer MAHLE

Part Number

4040MS
5 reviews
Sale Price

$104.54

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The MAHLE 4040MS piston ring set is designed for engines with a 4.040" bore diameter and features a drop-in installation with standard tension configuration. This precision-engineered ring set utilizes 1/16" top ring, 1/16" second ring, and 3/16" oil ring dimensions for optimal sealing and performance.

Key Features:

  • 4.040" bore diameter for precise fitment
  • Ductile iron top ring with plasma moly coating and barrel face configuration for superior wear resistance
  • Cast iron second ring with reverse twist design for enhanced oil control
  • 3-piece oil ring assembly for consistent cylinder wall sealing
  • Standard tension design balances sealing performance with reduced friction
  • Ultra-flat ring flanks maximize ring-to-piston groove sealing

MAHLE's advanced piston ring technology utilizes computer simulation and development tools to minimize friction and unlock free horsepower. The plasma moly coating on the top ring provides excellent scuff resistance during break-in, while the reverse twist second ring helps maintain proper oil film thickness. This ring set is ideal for performance rebuilds and street applications where reliable sealing and durability are essential.

Products specifications

Bore (in)

4.040 in.

Bore (mm)

102.616mm

File Fit

No

Gapless

No

Oil Ring Included

Yes

Oil Ring Material

Stainless steel

Oil Ring Tension

Standard

Oil Ring Thickness

3/16 in.

Quantity

Sold as a set.

Second Ring Facing Material

Cast iron

Second Ring Included

Yes

Second Ring Material

Cast iron

Second Ring Thickness

1/16 in.

Top Ring Facing Material

Plasma-moly

Top Ring Included

Yes

Top Ring Material

Ductile iron

Top Ring Thickness

1/16 in.

Piston Ring Thickness

1/16, 1/16, 3/16

Prop 65

WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov

excellent ship time and exceptional pricing deffinatly will buy from here again

Fast shipping, product was excellent .

Good experience would definitely buy from again

Smooth transaction, very pleased

They made a mistake with the shipping address, but, they took care of it very politely and professionally. Very nice. Thanks.

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