12602691 - Production LS2 / 6.0L Gen IV Block - 4.00" Bore, 9.240" Deck, 2.56" Mains, 6 Bolt Main, Aluminum Block

Use this aluminum Gen IV cylinder block as teh starting point for a big-inch custom street or competition engine. Many Gen III (LS1 & LS6) components, including cylinder heads and reciprocation parts, can be used.

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.

• Direct replacement for 2005-2008 LS2 Corvette, SSR, GTO 6.0L and TrailBlazer SS
• Production 319-T5 aluminum block with iron sleeves
• Production oiling system
• 6-bolt iron main bearing caps
• 9.240" deck height
• Use only LS1, LS6, LS2, L92/LS3-style cylinder heads
• 4.00" finished bore (101.6mm)
• Provisions for Active Fuel Management
• Great for stroker cranks for even more cubes
• Tested to over 450 horsepower!