The larger .50 size engine of the Raptor 50 needs a larger volume muffler than 30V2 muffler.
The 30V2 muffler has 35 mm between the mounting bolts and will not fit on a .50 size engine that has 37 mm between the bolts.
You could use the S3003 servo to start with, but you should "really" use ballbearing servos on a heli.
The bushings of the S3003 will wear out very fast.
The S3004 is better and the S9202 is one of the best servos for Helis.