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55.25 (cm)
44.75 (cm)
67.61 (cm)
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GM Performance LSX 376 Block 9.240" Deck 4.065" Bore

These GM Performance LSX Bowtie engine blocks have been designed for the advanced competition engine builder. They feature Siamese cylinder bores and a semi-finished deck height. The Chevrolet Performance LSX Bowtie engine blocks can accept a maximum stroke of 4.250 in., a maximum bore of 4.250 in., and they can support displacements of 454 cu. in. or more. The blocks feature cast iron construction with a powdercoated orange finish. They accept all Gen III and IV LS-style cylinder heads, crankshafts, camshafts, and other components. 

Additional features of the Chevrolet Performance Parts LSX Bowtie engine blocks include:

    • * 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 that can be machined to accept 60mm roller bearings
    • * Can be machined for larger diameter lifters
    • * External oil pump feed at the rear
    • * Added 7th transmission bolt hole to work with early-style GM transmissions
    • * Can accept a front motor plate for racing use
    • * Threaded freeze plugs that can be used for external heaters or coolers
    • * Windowed main bulkhead