TL/DR - Coolant capacity?

Planning on doing a coolant flush along with the timing belt change and a transmission drain 'n fill, curious to know that the recommended amount of coolant is dedicated to the LS430...

 

To completely drain the coolant, you will have to loosen the radiator drain plug, and 2 other drain **** plugs on the sides of the engine (see Post #9 on the link below)
https://www.clublexus.com/forums/ls-...-and-fill.html

The cooling system's capacity is 10 US quarts (9.5L)

 

What do you buy as the "correct" coolant and where do you get it from? Finished timing belt change (which came with coolant flush) and figure I should have some lying around

 

If you had the job done at a Lexus or Toyota dealer they would have used the Toyota brand. If you didn't they most likely did not use that and you can use any brand you want. I buy mine from the Toyota dealer.