when i used to have my second gen db2....i believe it kicked in at 5700, but i might never know cuz the person i bought mine from swapped in a 90-91 ls gauge cluster....prolly for lower milage. i crashed my car a few days before i received the jdm cluster. would the rpms still be correct? i was able to take the car well past the visual redline till 8000....the end of the tach.