12729604 - Production L92 / LS3 Gen IV Block - 4.065" Bore, 9.240" Deck, 6 Bolt Main, Aluminum Block

The LS Series cylinder block is the foundation for the serious performance achievements that are driving a new generation of street and racing enthusiasts. Features include a deep-skirt casting (the block side extends below the crankshaft centerline); 6-bolt cross-bolted main caps, strong and lightweight aluminum alloy casting (most productioin blocks) and provisions for the latest in engine control management. The cam-in-block configuration brings inherent torque to every LS engine, with production-based blocks capable of supporting combinations of 500 horsepower or more. The corvette ZR1'sunique 6.2L block, for example, supports the engine's 638-horsepower rating. GM Performance Parts' high-performance inon LSX cylinder block supports more than 2000 forced-inductioni horses!

Whether you're building a mild street engine or an Outlaw racing engine, starting with a strong LS cylinder block brings the assurance that you'll amke the power you need with a durable foundation.

L92 / LS3 Aluminum block

• Direct replacement for 2007-2008 L92 and 2008 LS3 6.2L
• Production aluminum block with iron sleeves
• Production oiling system
• 6-bolt main bearing caps
• 9.240" deck
• Use with LS1, LS6, LS2, L92 or LS3 cylinder heads
• 4.065" finish bore (103.25mm)
• Provisions for "active fuel management"
• Great for stroker cranks and even more cubes
• Tested to over 500 HP