7.02,43
see here: http://www.iaaf.org/statistics/toplists/inout=o/age=n/season=2012/sex=M/all=n/legal=A/disc=4X8/detail.html
37.10 by Jamaica in 2008
As of 14 Aug 2008, the world record for women's Olympic 4x200 meter freestyle relay is 7:44.31 held by Team Australia. The previous record was held by USA in 2007 of about 7:49
He was part of a world record relay team (from USC), but he never actually made or ran in the Olympics. I believe that the '68 US Olympic relay team beat that USC record in Mexico.
The current world record holder for the Relay open water swim is a Chinese team that completed a 140.6 km swim in 25 hours and 30 minutes in 2015.
The world record in the 4x100 meter relay was set by Jamaica (Usain Bolt, Michael Frater, Nesta Carter, Asafa Powell) at the 2008 Summer Olympics in Beijing in a time of 37.10 seconds. The women's world record is held by East Germany at a time of 41.37 seconds set in 1985.
That was swimmer Michael Phelps of the United States who set a world record, or was part of a relay team that set a world record, in 7 of the 8 events he won. Those events that Phelps won gold and set world records in were the 400 meter individual medlay, 4x100 freestyle relay, 200 meter freestyle, 200 meter butterfly, 4x200 meter freestyle relay, 200 meter individual medlay, and the 4x100 meter medlay relay. The only event that he did not set a world record in was the 100 meter butterfly and he did set an Olympic record in winning gold in that event.
2008 (4x100 meter relay)
10.1; 8.9; 9.0; 8.8
He set a world record in the following: 400 IM, 200 IM, 4x200 Free Relay, 4x100 Free Relay, 4x100 Medley Relay, 200 Freestyle, 200 Butterfly. Phelps also broke a Olympic Record in the 100 Butterfly.
The world record for the fastest 4x400 relay race is 2:55.39 and it was set by LaShawn Merritt, Angelo Taylor, David Neville, and Jeremy Wariner on the 23rd of August, 2008 at Bejing Olympics. 02008-08-23
2:54.5
The world record in the 4x100 meter relay was set by Jamaica (Usain Bolt, Michael Frater, Nesta Carter, Asafa Powell) at the 2008 Summer Olympics in Beijing in a time of 37.10 seconds. The women's world record is held by East Germany at a time of 41.37 seconds set in 1985.