I haven't had both. I can't tell you specifically how many track days you need to justify the SPL parts. Spherical bearings will transmit loads more NVH than a rubber or poly bushing. It's metal on metal, there's nothing to absorb anything.
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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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