I installed the wicked wheel when my turbo started to surge following the evolution programming. It only does it on hills when pulling in overdrive. The WW decreased it but did not eliminate the surge. I get rid of it by downshifting into 3rd and it goes away. On hard pulls you almost have to downshift anyhow to eliminate high EGTs so your not losing anything and I can still pull all the hills at 65 MPH in 3rd.