For those interested in this header with a stock motor setup, completely stock, here are the gains.
93.5 highport motor
stock exhaust
stock cat
stock air box
165,000mile spark plugs
stock ecu,
stock
stock
stock
only changes was i reset ignition timing to around 20 degrees cause it didnt want to run right...
i had to do several runs because the ECU kept pulling timing and or fuel out for some reason so i had to get it set so it wouldnt do that. then i got 3 runs identical....