If you've been reading GMHTP lately, you know that the new L92 heads are superior to stock LS1 and LS2 heads. But what happens when you put them to task against one of the best 15-degree heads on the ...
For the past several months HOT ROD and Duttweiler Performance have been evaluating the performance potential of the widely available 6.0L LS-series truck engine. Beginning with a stock 355hp/396 ...
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