Need a good truggy servo that doesnot need powered separately. Any recommendations

7955 is a great choice. Durable. strong, fast

Agreed. I kept blowing out my s9351 servos. Never broke anything steering related. After going to hitec 7955. I broke my tie rod end. Would much rather break a tie rod end than my $100+ servo...

+1 for HITEC!!!!! I have a 7955 in my sc10! And HITEC in all my others lol, u can't go wrong, and if something happens to it, simply send it to HITEC, they will gladly get it fixed for ya, and most of the time for nothing

XQ-S4618D,high performance brushless servo,nice match for 1:10~1:8 off-road and on-road racing Buggy.
Installed on your beloved buggy,the speed can even compete with professional
drivers.

Name:6.0V20kg-cm Brushless Digital Servo;
Size :A：40.2mm B：20.1mm C：38.8mm D：48.0mm E：10mm; Weight:60g（2.12oz）;
Gear type:Titanium Gear;
Speed:0.12sec/60º at (4.8V)
0.10sec/60º at (6.V)
Torque: (242 oz-in)17.4kg.cm.at(4.8V)
(285 oz-in)20.5kg.cm.at(6.0V) Digital servos features: Support high voltage;Waterproof; Plastic case, resist heat and corrosion; Aluminium middle hull, easy to eliminate heat;Adopt high quality Brushless motor.

Another vote for Hitec..

Tower has the Hobbico CS-170, which is a rebadged Hitec 5955(which afaik is identical to the 7955)... In any case, killer value for money...