Key Specs

MFG. Part #
BrandHastings Racing Rings
Piston Ring Diameter

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Hastings Manufacturing designs and manufactures piston rings for the world’s most recognizable and trusted brands

For over 100 years, Hastings Manufacturing never wavered from their first and only mission—to make the best piston ring possible. Hastings offers piston rings for nearly any application worldwide—from automotive and truck, to agriculture, industrial, small engine, as well as marine and high performance engine applications.

Top Compression Rings

Top compression rings (UCRs – upper compression rings) control combustion chamber gases allowing the piston to transfer the energy of the expanding combustion gases, to the crankshaft. These rings also play a major role in the heat transfer process between the piston and cylinder wall. The top compression rings come in a variety of coatings and four popular styles.

Second Compression Rings

Second compression rings (LCRs – lower compression rings) scrape oil and prevent it from reaching the combustion chamber. They also provide a second seal to trap combustion gases and aid in the heat transfer to the cylinder wall. Second compression rings can be made of gray cast iron, ductile cast iron, high alloy steel, or stainless steel. Secondary compression ring profiles come in three popular styles.

Oil Control Rings

Hastings is the pioneer of oil control ring technology. In 1956, they invented the multi-piece oil ring, followed by the Flex-Vent® expander—the design standard by which all other oil rings are compared today. The Hastings oil control ring is energized by our Flex-Vent® expander, which provides uniform pressure through two steel rails assuring positive oil control. The three-piece design allows rails to be manufactured with a small cross-sectional area for better conformability to the bores of today’s low-tension, low-friction engines. Their oil rings come in four popular styles.

  • Ford Flathead V8 engine four piston ring set with 3.1875 Inch bore, 8 cylinders
  • Available in sizes: Standard, .030 oversized, .040 oversized, .060 oversized, and .080 oversized
  • Top ring - 5/64 inch groove, grey iron ring material, phosphate ring surface treatment
  • 2nd ring - 5/64 inch groove, grey iron ring material, phosphate ring surface treatment
  • 1st Oil ring - 3/16 inch groove, steel rail and stainless expander material, chrome rail ring surface treatment
  • 2nd Oil ring - 3/16 inch groove, grey iron ring material, phosphate ring surface treatment

CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


MFG. Part #
BrandHastings Racing Rings
Piston Ring Diameter
Piston Ring DesignConventional
Top Ring MaterialCast Iron
Top Ring Thickness3/32"
Second Ring MaterialCast Iron
Second Ring Thickness3/32"
Oil Ring Thickness3/16"
Oil Ring TensionStandard Tension
Sold in QuantitySet
NotesFlathead Ford