ST/SU

753 topics in this forum

1. 2022 ST1-4 and ST5&6 Rules Revisions (v16.2 and 5.2) Released

   By Greg G., January 25, 2022
   • 20 replies
   • 2.4k views
   • 
   • Greg G.
   • March 12, 2022

2. 2022 ST Rules Release Today! 1 2 3

   By Greg G., December 2, 2021
   • 68 replies
   • 10.3k views
   • 
   • esr
   • February 27, 2022

3. Question on Lexan Thickness and OEM Door bars

   By Magus2727, December 29, 2021
   • 3 replies
   • 553 views
   • 
   • Magus2727
   • February 12, 2022

4. 2021 Rules Time--How about no changes? 1 2

   By Greg G., September 11, 2020
   • 30 replies
   • 6.1k views
   • 
   • daytonars4
   • January 17, 2022

5. 2022 ST/TT Car Classification Form is Live

   By Roman V., January 6, 2022
   • 0 replies
   • 1.7k views
   • 
   • Roman V.
   • January 6, 2022

6. 2022 ST/TT Car Classification Calculator Only

   By Roman V., December 7, 2021
   • 6 replies
   • 3.1k views
   • 
   • Roman V.
   • December 8, 2021

7. 2021 ST/TT Car Classification Form

   By Roman V., January 5, 2021
   • 12 replies
   • 3.9k views
   • 
   • Greg G.
   • December 8, 2021

8. Technical Bulletin: Goodyear DOT Radial RCMD - Provisional Classing as "Autocross" for ST4-6-- 6-10-21

   By Greg G., June 11, 2021
   • 7 replies
   • 1.9k views
   • 
   • mrgsquared
   • December 5, 2021

9. 2022 rules period?

   By tcdesign, November 1, 2021
   • 10 replies
   • 1.5k views
   • 
   • Greg G.
   • December 2, 2021

10. ST4 splitter and air dam question

    By ssmith, April 30, 2020
    • 3 replies
    • 1.4k views
    • 
    • Greg G.
    • November 10, 2021

11. Bug in ST4 compliance calculator

    By ssmith, October 8, 2021
    • 1 reply
    • 563 views
    • 
    • Greg G.
    • November 10, 2021

12. IMSA Prototypes

    By hansbliss99, September 21, 2021
    • 2 replies
    • 850 views
    • 
    • davidfarmer
    • October 26, 2021

13. ST5/TT5 Suspension Mod Factor question

    By TimRoberts, October 15, 2021
    • 5 replies
    • 644 views
    • 
    • TimRoberts
    • October 19, 2021

14. ST6 Miata's need to move to ST5

    By travis77, March 8, 2021
    • 6 replies
    • 1.5k views
    • 
    • 944buzz
    • September 11, 2021

15. Acura Integra GSR in ST6 Eligibility using B16 head and Intake?

    By BlackWidowRacing, August 18, 2021
    • 4 replies
    • 630 views
    • 
    • Greg G.
    • August 24, 2021

16. ST5 Modified Front Bumper rule clarification

    By Tansar_Motorsports, July 26, 2021
    • 2 replies
    • 659 views
    • 
    • Tansar_Motorsports
    • July 27, 2021

17. Factory Fender Vents in ST4

    By jonvo, July 29, 2020
    • 8 replies
    • 1.6k views
    • 
    • Dunzcon
    • July 13, 2021

18. ST5 splitter question

    By MWC, April 26, 2021
    • 2 replies
    • 818 views
    • 
    • MWC
    • April 27, 2021

19. ST5 and 6 Subframe Modifications

    By CRallo, March 7, 2021
    • 1 reply
    • 702 views
    • 
    • CRallo
    • April 15, 2021

20. Modifying Hood for Engine Clearance?

    By CRallo, March 7, 2021
    • 1 reply
    • 611 views
    • 
    • CRallo
    • April 15, 2021

21. Wireless ECU devices in ST5?

    By Dave Harris, March 22, 2021
    • 3 replies
    • 893 views
    • 
    • Eric Jensen
    • March 29, 2021

22. ST5 Suspension Limitations

    By Shooting Brake, March 5, 2021
    • 3 replies
    • 629 views
    • 
    • Tansar_Motorsports
    • March 5, 2021

23. ST Subframe modifications

    By kartermdb, January 19, 2021
    • 2 replies
    • 752 views
    • 
    • CRallo
    • March 1, 2021

24. ST3 aero allowances

    By GHwerks, December 17, 2020
    • 6 replies
    • 1.2k views
    • 
    • davidfarmer
    • February 18, 2021

25. Question about ST4's ECU Rule

    By Tianheng, January 7, 2021
    • 1 reply
    • 729 views
    • 
    • NorcalTT
    • January 9, 2021