Re: LS Long Tube Headers?
Having driven the same LS truck at sea level in CA and at the track in Denver, the elevation KILLS power. Also, almost anything past a stock cam needs to breath. I’m not surprised at all by the power your making. Header will really help with your cam setup. I also second the speed engineering headers someone else posted about. Go on there site and search through the selections. You might be able to find ones that fit. The 2nd gen CTS-Vs sweep back a good amount.
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