What specs for steering servo?

[DrDiff]

I just purchased a Freightliner Concordia Evolution kit.

Can someone tell me what specs I need for the steering servo?

Thank you

[Bo Wallen]

Hitec servos. this one is the most common one in r/c trucks so far. http://hitecrcd.com/products/servos/sport-servos/analog-sport-servos/hs-645mg-high-torque-metal-gear-servo/product