Attention Holley EFI TC-1 / TC-2 Users-
A firmware update is now available to allow your TC-1 / TC-2 to use our new 32 tooth trigger ring. This update is available online for older units, and is standard in all units purchased after 12-15-17. Units marked with “32T Ready” on the back are compatible, as well as any manufactured after Dec. 2017.
Units manufactured before Dec. 2017 will have to be returned to Davis Technologies for a hardware update ($25). There is no charge for the update if purchasing a 32 tooth ring from Davis Technologies.