question: Who is the tuner after season 2004 with Gaurav Gill as the driver, Team MRF, and Mai governing body?
answer: SELECT tuner FROM table_name_86 WHERE season > 2004 AND driver = "gaurav gill" AND team = "team mrf" AND governing_body = "mai"
context: CREATE TABLE table_name_86 (tuner VARCHAR, governing_body VARCHAR, team VARCHAR, season VARCHAR, driver VARCHAR)