This is the one formula that holds true through out the whole universe
As far as the aftermarket stereo, that shouldnt matter, if you have an amplifier and subwoofers hooked up they might try and deny you, but if they do tell them that its a bunch of BS (because it is).
Goodluck with the warranty
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VS Cam,CompCams lifters,ZZPpushrods,Rollmaster double,4"intake,PLog headers,3"exhaust,IntensePCM,3.3"mps,ZZPHDTrans,3.29gears,2500 stall,GMPP adjustable suspension,TB spacer,160*tstat