For high grip (fresh EoS or CRC carpet) then metal 2gear with thick oil, 100-150k seems to be the go-to setup.
For more normal club level grip, the kit graphite gears will do the job. The metal gears just create more binding for more forward drive, and running only 2 gives more oil volume for more consistency.
The Xb2 20 is a real beast, I've found at least 0.4s a lap over my 18 car. Could well be the best car out there now for carpet
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