Balance Shaft removal

I've heard that if you remove the balance shaft on the Spec V you can gain a bit more horsepower and torque. Is this true? How much do you actually gain? What are the side effects?

you will gain about 8whp from this mod. side-effects are extra vibration, but i hear it's well worth it. you will also be using 2 more quarts of oil after bs removal.

it also voids your engine warranty

the vibrations can only be felt between 3,500 and 4000rpm. Read the latest HIC magazine, they did an article on the spec V BS removal