Well guys I currently got across a good deal for a Hpi 2.4ghz TF-20 / RF-20 combo, I was wondering if this was compatible with my rs4 3 evo+ which has the SF-1 Steering and Throttle servos. Also Will it basically be plug and play?

It's the same radio gear that comes with the Savage XL

Thanks!

Your servos will be compatible with that radio. Once you install everything plug the servos in correctly, it should work. Like you say, plug and play.