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the 2 tuners I have spoken to are using different programs 1 is using hp and the other is using x3 cal. the one using a hp tuning program recons he is happy to tune to 12psi and the other guy recons a min 16psi on his tunes he recons 60lbs injectors dump and cat with my exhaust and his tune should net me 310-320rwkw with out touching an anything else ill be running only pulp 98, later ill upgrade the intercooler to a factory f6, and also do all the plumming to a alloy pipping. im wantin to keep it looking as stock as I can under the bonnet. I have ordered sum semi sliicks 17x 255 45rs and was wanting to pull sum low 12s or even break into the 11s later ill upgrade the turbo to gt3540r off a F6.

hey guys I am new to the page looking for some advise. I have a 2008 G6ET currently with only a 3" cat back exhaust with rear muffler delete, currently making 240rwkw looking at doing these mods. 60lbs injectors 4" dump pipe high flow cat 12-16psi boost increase custom tune either HP tune or x3 tuner (what are your thoughts?) would it be right to expect somewhere around 300-320rwkw from this. and with this can I expect to net low 12s high 11s I have already landed a 13.00 @ 109mph 60foot 1.98