What are the stock specs of a stock GMC sirra 2003 5.3l.
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What are the stock specs of a stock GMC sirra 2003 5.3l.
Duration @ .050" somewhere near 190 and lift somewhere near .470". Someone else probably knows for sure.
Easy search on Google. Try it sometime.
5.3 LM7
190/191 int/exh @ 0.05" duration
0.466" / 0.457" int/exh lift
114 LSA
LS1 Info and Specifications - SMOKEmUP.com
I guessed good :spit: