having 3" exhaust is going to be tough to keep quiet,plus reducing low end & mid range torque.
MBHD
Think its mainstream thinking now that backpressure is a myth. Running 3" would likely mimic an open exhaust, which is actually ideal, given proper engine tune, based on current thinking. Sure, opening up the exhaust would likely make the engine feel soft in the lower rpms but with tuning, it should recoupe if not increase the low rpm tq.
Plus a larger pipe will offer a deeper quieter tone vs a smaller diameter pipe, as the sound waves will slow down vs the smaller diameter pipe would likely increase the velocity.
