I run Futaba S9351 on steering & S9350 on brake/throttle. If you need more than that, you gotta go over your car settings. I never had any issues with these Futaba servos either. Powerful servos is one thing, failing ones is another. Warranty does you no good on race day when its dead. That I have yet to see on a Futaba setup correctly. Just clean and grease the gears sets every now and then and you should be fine. I literally watched a S9350 move an engine during full throttle and center brake ass'y when braking on a Kyosho MP777 SP2. We thought the engine mounts were loose, but it was the servo flexing the mounts/frame towards the servo because the ends points weren't set yet!