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Since 1952

Speedway Plasma Moly Piston Rings, 4.00 Bore, Style C

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Piston Ring Style:
Piston Ring Design:
Top Ring Material:
Plasma Moly Coated Cast Iron
Second Ring Material:
Plasma Moly Coated Cast Iron
Top Ring Thickness:
Second Ring Thickness:
Oil Ring Thickness:
Oil Ring Tension:
Standard Tension
Garage Sale:
Piston Ring Diameter:
Speedway Plasma Moly Piston Rings, 4.00 Bore, Style C

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Q & A

What's in the Box

Speedway premium Plasma Moly piston rings work with either gas or alcohol fuels, handle 8000+ rpm, and up to 14:1 compression.

Ring Style Chart (GIF)


Speedway Piston Ring Hierarchy

  • Good - Speedway Gas Proven Series
  • Better -Speedway Moly
  • Best - Speedway Plasma Moly
  • Ultimate Race - Speedway Pro Series

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Total Seal Conventional Piston Rings, 4.00 Bore, Style C
(Part #718CR3690)

For years Total Seal has been leader in performance ring technology. These conventional style ring sets featuring a plasma moly ductile iron top ring, cast second and a 3-piece oil ring.

Drop-in sizes available in 000, 030, 040, and 060 sizes. File fit sizes available in 005, 035, 045, and 065.

Ring Style Chart (GIF)

Speedway Pro Series File-Fit Piston Rings, 4.00 Bore, Style C
(Part #915400)

By using an 80,000 psi low friction, low porosity plasma moly top ring along with purpose build second and oil rings, we have the best rings for the buck on the market. You will make more horsepower over other brands using these rings due to the unique design and ring face finish. 20+ additional horsepower has been seen using these rings. File fit design.

  • Top  1/16"
  • 2nd  1/16"
  • Oil  3/16"

Ring Style Chart (GIF)

Total Seal Claimer Piston Rings, 4.00 Bore, Styles A, C, D
(Part #7182000)
                        These new, lower priced rings are designed for claimer-type motors. Claimer sets feature a cast iron, moly coated conventional top ring, Gapless 2nd ring, and Gold power low tension oil rings. Built primarily for dirt track racing engines with 11:1 or lower compression on race fuel. 
  • Moly coated cast iron top ring
  • Gapless 2nd
  • Low tension oil ring
  • Drop-in sizes available in 030, 040, and 060 sizes

Ring Style Chart (GIF)

Speedway Gas Proven Series Piston Rings, 4.00 Bore, Styles A, C, D
(Part #9152271)
                        Speedway Gas Proven piston rings are the best value in piston rings! These tough rings will withstand 12.5 maximum compression, 7000 maximum sustained RPM, and up to 450 HP. First and second rings are cast iron yielding 55,000 psi strength with end gap factory set at .012" to .018". Three piece oil ring features chrome rails over a stainless steel expander, which gives uniform wall pressure and efficient oil control.  

Designed for gasoline use. Not recommended for use with alcohol.

Ring Style Chart (GIF)