Email features have been reactivated 4/17/24
A few can crack the 2kg mark like Keitt, R2E2 and rabaul but these are very occasional fruit.
Bowens I have heard of occasional outsized ones but they average smaller. 2kg might be a stretch still. There is also a late hong kong one and the real name escapes me but golden queen is sometimes applied.
Springfels are massive. There was a mango talk that I went to years ago and the guy who gave the talk had one on his display table that I first thought was a papaya from a distance. I think one of the pineapple series mangos from Zill is a seedling of Springfels and is also quite large. Lara Farms has a mango they say is quite large.
Funny I posted a pic on the big mango on an old thread but was talking about KPs.
Cat Saigon aka Golden Queen - Keitt x Ivory variety