gregg3gs,

I got the ESS E-Flash tune. I can't say it makes a huge difference but it feels like it might have . They did make it more "aggressive" for me after I asked for that.

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2008 X5 4.8i | Wheels: Summer> style 336 20" RFT; Winter> style 214 Ferric Grey 20" RFT | Aero kit | ESS E-Flash tune | V1 | LCI Rear Tail Lights | Coding completed | Engine replaced at 90K