TRW Lucas GP600 Racing Brake Fluid

[gslrallysport]

Lucas Grand Prix 600 Racing Brake Fluid!

Unlike other RBF600's Lucas is backward compatible with the lower DOT fluids, so if you get stuck needing to fill up with other fluid, it won't have any adverse effects, other than lower its performance...

TRW GP600 Dot 4 Racing Brake Fluid
Dry - Min 310
Wet - Min 204

That's about the best out there short of Castrol SRF, or GS610. But significantly cheaper than either of them at $65 for a 1L bottle.

For comparison, some other popular brands:
Motul Dot 5.1
270 dry
185 wet

Castrol Response Super Dot 4
286 dry
184 wet