It doesn't really quiet it down it changes the sharpness of the impact sound depending on what materials the piston head and cylinder head are. Sorbo's primary function is aoe correction, the shock absorbing nature of the sorbo absorbs impact forces at the front of the gearbox, helping prevent shell failures at the corners of the cylinder window. Anything else that happens as a benefit is a bonus, not a goal, imo. If you had a plastic CH and PH to start with, chances are the hit wasn't very loud to begin with. Also the lighter the piston assembly the lighter the sound.
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I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.
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