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SPI Pistons and Rings

Part Number 513-2
SPI Pistons and Rings
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  • All individual components are interchangeable with original parts.
  • Piston weight is comparable with original piston.
  • All pistons, rings, pins and circlips are manufactured to OEM specifications.
  • Includes: 1 piston, 1 ring set, 1 wrist pin and 1 circlip set.
  • Engineered to provide the best possible path for combustion chamber heat transfer to the cylinder walls.
T-MOLY SERIES: Includes: 1 piston, 1 ring set, 1 wrist pin and 1 circlip set. Machined Smooth Heads: A machined smooth piston crown should reflect combustion heat while reducing carbon buildup and protecting the top of the piston. Some tests have shown that a machined smooth head can increase HP and fuel economy by up to 6%.

MOS2 (Teflon-Molybdenum Coating): MOS2 is composed of sub-micron sized particles of solid lubricant and resin blends of solvents. The coating is rolled on, so it provides 10 times the bond strength of spray on coatings. This draws heat through piston walls and out the bottom, reduces heat and friction for added power and longevity, helps eliminate cold seizures and increases durability.

Hard Anodized Crowns: Pistons that are not anodized have a hardness of HRB 60, and pistons that are anodized have a hardness of HRB 105. This makes SPI pistons 75% stronger than non-anodized pistons. This increases heat resistance, minimizes piston expansion and contraction and reduces the coefficient of friction.

Hypereutictic Cast: A hypereutectic cast piston is a piston with increased silicon content. The end result is a piston that has an increased hardness, is more resistant to wear and has an increased ability to withstand higher cylinder temperatures, pressure and detonation. This helps reduce expansion from heat, makes the piston more durable and resistant to wear and allows the piston to run tighter clearances.
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