This is a GM .030″ Cylinder Over Bore size GEN III LS Series 5.3L / 4.8L Engine Short Block.

* block casting # : 12551358
* Description : GM .030″ over bore sized 4.8L / 5.3L LS Series LM7 / L59 / LR4 GEN III Short block w/ new cam bearings
* Specs – Material          : Iron                Displacement  : 5.3L / 325 c.i.d.                Bore Dia          : 3.810 in                Stroke              : 3.622 in                Deck Height    : 9.230-9.240 in                Main Cap        : 6-Bolt                Piston               : Flat Top; Hypereutectic; Floating Pin; Coated Skirt                 Cam Bearings : Durabond                Crankshaft / Rod : King Bearings

* information : CAMSHAFT NOT INCLUDED.             

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