Page 225 of GM Performance Parts 2006 Catalog by GM Parts Direct

NOTE: NOTE: NOTE: Gen V Crankshaft B 572 Crankshaft C CRANKSHAFTS GM Performance Parts crankshafts listed in this section are the backbone of a high-performance engine build and are the same components that go into GMPP crate engines. A. 3963523 Crankshaft, forged steel (454 502 cubic inches) Externally balanced, nitride-treated 1053 forged steel with 4.00" stroke, cross-drilled 2.75" diameter main bearing journals, and 2.20" diameter rod bearing journals. Must be used with counterweighted torsional damper and flywheel or flexplate. 3963524 Crankshaft, forged steel (454 Mark IV 502 cubic inches) Premium quality, externally balanced, nitride-treated 5140 forged steel with 4.00" stroke, cross-drilled 2.75" diameter main journals, and 2.20" diameter rod bearing journals. Must be used with counterweighted torsional damper and flywheel or flexplate. 14096983 Crankshaft, forged steel (Gen V Gen VI 454) (not shown) Externally balanced, forged 1053 steel crankshaft with one-piece rear main seal. B. 10183723 Crankshaft, forged steel (Gen V Gen VI 502) Externally balanced, cross-drilled, nitride-treated forged 1053 steel crankshaft with one-piece rear main seal. 10114186 Crankshaft, forged steel (Gen V Gen VI 427) (not shown) Steel 1053 crankshaft with 3.75" stroke for 1991-and-later 427 cubic inch engine. C. 88961554 Crankshaft, forged steel (572 cubic inches) Premium 4340 steel forging for 572 cubic inch engines. Must use main bearing P/N 88962212 and rod bearing P/N 88962926. Crankshaft, forged steel Mark IV A 223

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