Chevrolet Performance LSX Bowtie engine blocks are designed for the advanced competition engine builder. They feature Siamese cylinder bores and a semi-finished deckheight. The blocks can accept a maximum stroke of 4.250 in.,a maximum bore of 4.250 in., and can support displacements of 454 cu. in. or more. LSX Bowties feature cast iron construction with an orange powdercoat finish. They acceptall Gen III and IV LS-style cylinder heads, crankshafts, camshafts, and other components. Order the model with deck height and other options needed for your application.

• Front oil feed lines that can be plugged or restricted for mechanical flat tappet or mechanical lifter applications
• Can be safely machined to 9.200 in. deck height
• 1054 billet steel 6-bolt main bearing caps
• 6-bolt cylinder head bolt pattern
• Cam bores thatcan be machined to accept 60mmroller bearings
• Can bemachined for larger diameter lifters
• External oil pump feed at the rear
• Added 7th transmission bolt hole to workwith early-style GM transmissions
• Can accept a front motor plate forracing use
• Threaded freeze plugs that can be used for external heaters or coolers
• Windowed main bulkhead