ST/SU

757 topics in this forum

1. ST-5 tires

   By jhp, February 13, 2018
   • 6 replies
   • 3.1k views
   • 
   • Roman V.
   • May 11, 2022

2. Sports Racer classification

   By EB Turbo, April 25, 2022
   • 1 reply
   • 526 views
   • 
   • Greg G.
   • April 25, 2022

3. Hoosier and Michelin Mod Hit

   By CeeDubb, April 24, 2022
   • 1 reply
   • 849 views
   • 
   • daytonars4
   • April 24, 2022

4. Technical Bulletin: Avg HP Calculations--All ST & TT 3-11-22

   By Greg G., March 11, 2022
   • 10 replies
   • 3.1k views
   • 
   • Greg G.
   • March 12, 2022

5. 2022 ST1-4 and ST5&6 Rules Revisions (v16.2 and 5.2) Released

   By Greg G., January 25, 2022
   • 20 replies
   • 2.5k views
   • 
   • Greg G.
   • March 12, 2022

6. 2022 ST Rules Release Today! 1 2 3

   By Greg G., December 2, 2021
   • 68 replies
   • 10.8k views
   • 
   • esr
   • February 27, 2022

7. Question on Lexan Thickness and OEM Door bars

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

8. 2021 Rules Time--How about no changes? 1 2

   By Greg G., September 11, 2020
   • 30 replies
   • 6.3k views
   • 
   • daytonars4
   • January 17, 2022

9. 2022 ST/TT Car Classification Form is Live

   By Roman V., January 6, 2022
   • 0 replies
   • 1.8k views
   • 
   • Roman V.
   • January 6, 2022

10. 2022 ST/TT Car Classification Calculator Only

    By Roman V., December 7, 2021
    • 6 replies
    • 3.3k views
    • 
    • Roman V.
    • December 8, 2021

11. 2021 ST/TT Car Classification Form

    By Roman V., January 5, 2021
    • 12 replies
    • 4.2k views
    • 
    • Greg G.
    • December 8, 2021

12. 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

13. 2022 rules period?

    By tcdesign, November 1, 2021
    • 10 replies
    • 1.7k views
    • 
    • Greg G.
    • December 2, 2021

14. ST4 splitter and air dam question

    By ssmith, April 30, 2020
    • 3 replies
    • 1.7k views
    • 
    • Greg G.
    • November 10, 2021

15. Bug in ST4 compliance calculator

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

16. IMSA Prototypes

    By hansbliss99, September 21, 2021
    • 2 replies
    • 1.2k views
    • 
    • davidfarmer
    • October 26, 2021

17. ST5/TT5 Suspension Mod Factor question

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

18. ST6 Miata's need to move to ST5

    By travis77, March 8, 2021
    • 6 replies
    • 1.8k views
    • 
    • 944buzz
    • September 11, 2021

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

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

20. ST5 Modified Front Bumper rule clarification

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

21. Factory Fender Vents in ST4

    By jonvo, July 29, 2020
    • 8 replies
    • 1.7k views
    • 
    • Dunzcon
    • July 13, 2021

22. ST5 splitter question

    By MWC, April 26, 2021
    • 2 replies
    • 1.1k views
    • 
    • MWC
    • April 27, 2021

23. ST5 and 6 Subframe Modifications

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

24. Modifying Hood for Engine Clearance?

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

25. Wireless ECU devices in ST5?

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