All the sprint booster does is amplify the throttle signal. It'll feel peppier at part throttle, but WOT will feel like it's occuring at less than full throttle. For the cost of the sprint booster, you're well on the way to paying for a tune. Get the tune. It comes with other nifty stuff, as well as more power. Intakes can also improve throttle response. If you're going to get a tune, get any other mods you may want before the tune so you don't have to do it twice.
I'm not going to get into the pulley debate here. Many people experience good results. There is also the potential for serious issues. Do your research on that one.
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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent
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