243s came on c5 z06's which are the LS6 heads [longer valves and ligther]Originally Posted by Chevy-Art
243s came on LS2 and LS4 motors [these motors had the yellow springs but standard valves]
243s came on 5.3 HO
243s came on GenIV 5.3 and 4.8
^^^^^^^^^these heads had standard valves and springs as well
2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
2002 Silverado - 427Lsx w/ Twin gt4202s
2010 Silverado crewcab Z71 - 5.3litre w/ procharger
2000 Wrangler - 5.3litre with some stance
2014 Xsport- 3.5 Eco boost
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it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference
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