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LS1 4340 FORGED CRANK - 4.000" Stroke Forged 4340 steel non-twist forging Multi-stage heat treat process Cranks are 100% x-rayed, magnafluxed & sonic tested Stress relieved & shot peened .125 radius on rod & main journals for increased strength Precision ground & micro-polished journals to less than 5 R.A. Cross drilled & chamfered oil holes for improved oiling Indexed for correct stroke Nitrided journal surfaces for superior wear resistance #434640006100 stroke 4.000" balance internal bobweight 1790 constr 4340 Note: must use 6.125" rod or longer |