National Staff Greg G. Posted March 25, 2017 National Staff Share Posted March 25, 2017 Technical Bulletin--3-25-17: Addition to TT Rules: Appendix D— TT3 & TT4 OEM Aero Modification Factor non-BTM approvals Note: This statement from section 7.3.2.D.1 still applies to the above vehicles, "and do not have a rear wing or rear spoiler" Quote Link to comment Share on other sites More sharing options...
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