est hp on a 99 5.3 ironblock setup...please chime in......
11-26-2010, 09:05 PM
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est hp on a 99 5.3 ironblock setup...please chime in...... I have a 99 ironblock 5.3 with ls2 heads with yellow valve springs.with a stock ls2 cam also running a ls1 intake and tb.Ecm tune will be mild lmk what u guys think....
