Chevy LS Blocks and Heads

Number Catagory Date

12550592 LS Blocks 1997-up 346, LS1

12559846 LS Blocks 1998-up 346, LS1

12560621 LS Blocks 1998-up 346, LS1

12562174 LS Blocks 1998-up 346, LS1



10215339 LS Heads 1997 346, LS1, aluminum

68cc chambers

12480005 LS Heads 2000 LS1, GTZ, aluminum 38cc chambers 2.125/1.625 valves,angle plugs

12556743 LS Heads 1999 325, 5.3L, aluminum, truck, van

12558806 LS Heads 1997-1998 346, LS1, aluminum, 68cc chambers

12559853 LS Heads 1999 346, LS1, aluminum, 68cc chambers

12559862 LS Heads 1999-2000 aluminum, LS, 4.8 or 5.3L

12559895 LS Heads 2000 325 (5.3L) aluminum

12561706 LS Heads 2001-2004 325 (5.3L) aluminum

12561873 LS Heads 1999-2001 364, 6.0L, LS, 71cc chambers, cast iron

12562317 LS Heads 2001-2004 364, 6.0L, LS, 71cc chambers, aluminum

12564241 LS Heads 2000 346, LS1, aluminum, 68cc chambers

12564243 LS Heads 2001 346 (5.7L LS6) or 364 (6.0L LS2), aluminum

12572035 LS Heads 2001-2004 364, 6.0L, LS, aluminum, 71cc chamber