Who holds the record for highest rating in a super bowl?

Phil Simms of the 1986 New York Giants completed 22 of 25 passes (88%) for 268 yards and 3 TD. He had the highest Passer Rating in Super Bowl history with a rating of 150.9

Source: http://www.nfl.com/superbowl/44/categorystats?d-447263-o=2&tabSeq=0&statisticCategory=PASSING&d-447263-p=1&d-447263-s=PASSING_PASSER_RATING&d-447263-n=1