power gains with cat bypass pipes

[spongebob]

Originally Posted by BYprodriver

Usually the cheapest way to dampen vibration is to ADD weight!

I agree but, changing the weight in either direction will change the freqency and amplitude of the vibrations hopefully out of the " critical rpm" that this engine seems to have. Also putting less load on the transmission mounts will give them more room to dampen the vibrations.
This is just my theories but the will be tested later when the white stuff on the ground is gone.