Engine - Block Components - Aluminum Bow Tie Block

From GM Performance - An aluminum block is an essential ingredient for a lightweight V6. This 356-T6 cast aluminum block is recommended for road racing and other applications where engine weight is a consideration. It is outfitted with centrifugally cast 4.00 inch diameter cylinder liners and billet steel four-bolt intermediate main bearing caps. These heavy-duty caps have angled outer bolts that add to the blocks bottom end strength. Technical Notes: Aluminum blocks are designed for crankshafts with 2.45 inch diameter main bearing journals. All production V6/90 degree engine components can be installed in aluminum Bow Tie blocks. Block weight is 70 lbs.