Product Description


This item is for .040 over bore "drop-in" Hastings ductile, plasma-moly piston ring set for 4.000" bore V-8 engines (Chevy 327, Chevy 350, Ford 302 small blocks) requiring 1/16"-1/16"-1/8" ring pack. P/N 2M5521-040.

Whether it's a car, truck, motorcycle, marine, or a performance racing application-properly sealing the piston to the engine block is a requirement. Hastings premium ductile ring sets do just that and will perform flawlessly in the most difficult environments. This premium ductile ring set is suitable for rebuilds and new builds. 



  • Bore: 4.040 in. (at .040 bore)
  • File Fit: No
  • Top Ring Thickness: 1/16 in.
  • Top Ring Material: Ductile iron
  • Top Ring Facing Material: Plasma-moly
  • 2nd Ring Thickness: 1/16 in.
  • 2nd Ring Material: Iron
  • 2nd Ring Facing Material: Phosphate Coated
  • Oil Ring Thickness: 3/16 in.
  • Oil Ring Material: Stainless steel


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