Does Korky 2021BP fit Toto CST454CEFG?

[trouper]

Was hoping to find an exact drop-in replacement flapper for the Drake II, instead of a universal option. Is the 2021 the correct model? If not, what is?

 

[Terry]

The Korky 2021BP is the 1.6 GPF version. They also make a 1.28 version.
The universal flappers will adjust.

 

[Sponsor]

 

[WJcandee]

You want the 3060, which is adjustable, or the 2023, which is also adjustable. You can use the 2021; it will go in no problem, but will cause your toilet to use an extra quart or so of water every flush.