actually, we put bullet is to reduce the noise, i dont get what u mean by pushing all the sound to the back? from my opinion, sound always come from ur muffler. If you add a bullet in the middle ,then, it will reduce the sound. Just the matter of how much the sound has been reduced..a good bullet like what you said F1 bullet RM240 , i think it is bloody expensive and should be in common sense, a very good bullet for me. So, the sound that created by ur muffler will be reduced almost 50% which i mean lowering the high pitch to a lower pitch(bassy). A bad,cheap bullet will gives u 30% sound reduce but its efficiency will drop after 3-4weeks. That's the difference of a good bullet and bad bullet.
Talking bout mufflers, if u want something sporty sound than ur stock one but less noise than the straight flow...no other choice, u need a s-flow.. the previous pages of this thread, we've been talking bout mufflers..read them..and hope they helps..good luck with ur decision ~!
Talking bout mufflers, if u want something sporty sound than ur stock one but less noise than the straight flow...no other choice, u need a s-flow.. the previous pages of this thread, we've been talking bout mufflers..read them..and hope they helps..good luck with ur decision ~!