J.E. Pistons 379435 FSR Ultra Series Piston Kit - Standard Bore 81.00mm, 13.5:1 Compression tools Made from quality aluminum

Made from quality aluminum

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J.E. Pistons 379435 FSR Ultra Series Piston Kit - Standard Bore 81.00mm, 13.5:1 Compression tools Made from quality aluminumBore: 81. 00mm Compression: 13. 5: 1 Compression Sizing: Standard Bore 1299cc. In house forging has allowed JE to develop proprietary Aligned Grain Flow Technology forging technology that directs the grain flow of the aluminum to flow around critical areas of the piston, increasing strength. Lateral gas ports channel combustion gases to the back of the top ring groove, which adds pressure behind the compression ring to keep it pushed against the