Only downside to cashmere interiot is jeans!! They love to run and make the leather go blue! I have custom made seat covers throughout mine now mainly for this reason (sorta defeats having leather now) but so be it. I've an 08 G6ET and first mods I did were ID1000's, herrod CAI, tune and that got me 298rwkw on 98 RON (which was high), I just scored a pw stage 2 cooler and venom cat pipe , pwr heat exchanger on ratters group buys. You just missed out on them by a week or so I think but they were good prices! Id definitely recommend cooler, id1000's, turbo side intake (I wish id done this), then cat pipe and maybe dump, tune. That will see you 300+. My tuner recommended I do valve springs next up but it varies car to car I believe at this power level.