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4340 H beam rods, Forged custom piston 8.75 to 10.75. Stroker crankshaft Select bore 3.945 or 3.960 Performance gaskets, oil pump, injectors 24lb stage 1 2 3 race cam lifters springs 4340 timming set 45 percent more hp 55 percent more torque. Most kits will ship in 5 to 10 days