Warranty:1 Years OE NO.:customzied Size:4.000/4.125 Application:for GM Chevrolet LS LS1 4.125 4.000'' Stroker Crankshaft Item name:for GM Chevrolet LS LS1 4.125 4.000'' Stroker Crankshaft Material:4340 Steel/Casting iron Heat treatment:Tempering/Nitriding Horsepower:Max 1000hp Show More