Quote:
Originally Posted by Dan in Pasadena
Not all LS engines are aluminum blocks. Mine's an LQ4 iron block with aluminum heads.
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A true gen IV LS is aluminum. The other L series like the LQ4 and LQ9 are 6.0 iron blocks versions but are not an LS (don't take me wrong the LQ is a great motor, especially since they arent as expensive as the LS and can make the same power) . There was another aluminum block, L76 I think, but had a different ignitions system and different performance.