If the Stillen kit is part of that $10k your budget is too low. Otherwise, nobody can tell you since nobody has ever made 500whp on the Stillen kit. My guess would be upgrading all the pullies, new fuel system, meth and a really aggressive tune.
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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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