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MAHLE 1979645 Oil Ring Support Rail Bore - 4.020-4.035 2mm

Part of: MAHLE Oil Ring Support Rail Bore

Other options in this family: MAHLE 9290024 MAHLE 9299228 MAHLE 9299226 MAHLE 1979648 MAHLE 9298909

Manufacturer

Picture for manufacturer MAHLE

Part Number

1979645
8 reviews
Sale Price

$5.91

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The MAHLE 1979645 is a precision-engineered oil ring support rail designed for engines with bore sizes ranging from 4.020 to 4.035 inches. This 2mm thick support rail is a critical component in high-performance and racing piston assemblies, particularly for MAHLE pistons where the wrist pin extends into the oil ring groove area.

Key Features:

  • Bore range: 4.020 to 4.035 inches
  • Thickness: 2mm (0.078 inches)
  • Prevents piston ring rotation for improved cylinder seal
  • Minimizes friction and ensures proper gas pressure at high RPM
  • Restores original clearances and allows full compression restoration
  • Features a dimple design that locks into the wrist pin bore gap

This support rail installs at the bottom of the oil ring groove and serves as the foundation for the oil ring assembly. The integrated dimple prevents rotation by seating in the gap created by the wrist pin bore. Professional installation is recommended, as proper positioning is critical for optimal engine performance and longevity. Sold individually.

Products specifications

Prop 65

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

Great prices fast amd free shipping

Nice website. Shipping very expensive.

quick,easy,real quick ,real easy. shocked at the simple process.

Great experience hope the parts arrive on time and it will make it even better

Quick and easy no annoying pop ups or sales ads

Good

Had a great experience and the product was perfect.

Works good for my 89 gmc 1500

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