Page 186 of GM Performance Parts 2006 Catalog by GM Parts Direct

LS1/LS6 5.7L Bare Block (side) A LS1/LS6 5.7L Bare Block (rear) A CHEVY LS SERIES 184 LS SERIES BLOCKS GM took a chance with the LS engine. They stayed true to the pushrod small-block and continued to push the technology to the point that building a daily-driven, 500-plus horsepower car is no big deal. The GM Performance Parts LS Series cylinder blocks are designed specifically for late model small-block engines that run the LS Family cylinder heads. These include the LS1, LS2, LS4, LS6, LS7, LQ4, LQ9, and L76. Our LS block selection ranges from a stock replacement all the way up to our C5R racing block designed to support over 900 horsepower! A. 12561166 LS1/LS6 5.7L Bare Block Direct replacement for 2001-2004 LS1 and LS6 Corvette 5.7L Production 319-T5 aluminum block with iron sleeves Production oiling system 6-bolt iron main bearing caps 9.240 deck height For use with LS1/LS6 cylinder heads only 3.89" finished bore (99.0 mm) No provision for Displacement On Demand Tested to over 400 hp! 12572808 LQ9 Cast Iron 6.0L Bare Block (Not Shown) Direct replacement for 1998-2004 LQ4 and LQ9 Truck and SUV 6.0L Production cast iron block Production oiling system 6-bolt iron main bearing caps 9.240" deck height For use only with LS1, LS6, LS2 and L76 cylinder heads 4.00" finished bore (101.6 mm) No provision for Displacement On Demand Tested to over 500 hp! 12568950 NEW LS2 Aluminum 6.0L Bare Block Direct replacement for 2005-2006 LS2 Corvette, SSR, and GTO 6.0L Production 319-T5 aluminum block with iron sleeves Production oiling system 6-bolt iron main bearing caps 9.240 deck height For use only with LS1, LS6, LS2 and L76 cylinder heads 4.00" finished bore (101.6 mm) Provisions for Displacement On Demand Great for stroker cranks for even more cubes Tested to over 450 hp! 12584727 L92 Aluminum 6.2L Bare Block Direct replacement for 2007 L92 6.2L Production aluminum block with iron sleeves Production oiling system 6-bolt iron main bearing caps 9.240 deck height For use with LS1, LS6, LS2 and L76 cylinder heads 4.065" finished bore (103.25 mm) Great for stroker cranks for even more cubes LS SERIES BLOCKS Part Material Deck Bore Main Cap Cranks Oiling Seal Max Max Usage Origin Number Height Bolt Material Jnl Dia. Stk Hp 12561166 Alum 9.240 3.89 6 Nodular Std. LS (2.56) Wet 1 Pc 4.00 450 Street LS1/LS6 12572808 Iron 9.240 3.98 6 Nodular Std. LS (2.56) Wet 1 Pc 4.00 500 Street LQ9 12568950 Alum 9.240 4.00 6 Nodular Std. LS (2.56) Wet 1 Pc 4.00 450 Street LS2 17802854 Alum 9.240 4.125 6 Steel Std. LS (2.56) Wet 1 Pc 4.00 500 Street LS7 12480030 Alum 9.240 4.117-4.160 6 Steel Std. LS (2.56) Wet 1 Pc 4.00 900 Pro C5R

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