National Staff Greg G. Posted December 22, 2016 National Staff Share Posted December 22, 2016 Technical Bulletin--12-21-16: Addition to ST Rules: 7.3.2.E) ST4 Anti-lock braking systems (ABS) For ST4 only--Anti-lock braking systems may only be OEM or offered specifically for the car model (any trim model or generation) as a factory option. No OEM systems offered for a different car model or aftermarket systems are permitted. Quote Link to comment Share on other sites More sharing options...
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