Pre-Order Jormungandr - long rod 372xp to 390xp pistonThis is the new 372 to 390 upgrade piston that Mark designed to utilize an OEM 592xp rod for the ultimate big torque in a small chassis works or races, depending on how it is built. Check out his videos on the origin of this design on his YouTube channel here: https: youtu. be YcpZ IkTp Msi=JoAY2BOOS6SKNrYl https: youtu. be tRThfyG0urAsi=SsjBgBtBFq6EBiuX https: youtu. be Nk7YLc_SN 4? si=yuTFj7DT220TuX3B This model will use a modified 372xp crankshaft
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Pre-Order Jormungandr - long rod 372xp to 390xp piston