Hitec 9381.

Watch out on the specs. The speed spec mentioned in the OP, would be a servo geared for speed. It'll slow down under load in a truggy. You want a high torque servo in truggy.

Hitec d945 would fit the OP spec well, though.

When you see absurd speed and torque specs, it's BS. Better to see what people are using, not what specs they're chasing.

A Tekin t300 would be a good choice too.