what is the loudest four stroke pipe?

[warrior350x]

i have to say, im running a DG Xccelerator stage 3 with out the spark arestor. its loud but i got a hell of alot out of the pipe. the before and after were two diffrent quads (to me). and it is loud but it still makes power and it looks bamn nice to. check out the xccelorator stage 3 its not as heavy as the RCM and is better, the xccelorator stage 3 isnt a chump.