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  1. Vortec 5300 5.3L V8
    So I’ve got a 2011 Silverado scsb z71, it’s got the flex fuel 5.3 and a 6l80e, I’ve had it tuned and 4 cyl mode disabled, it came with a k&n intake but im swapping that out for an s&b fully enclosed cold air intake, I run 93 octane for the tune I have and it is considerably snappier than before...
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