The street dominator is an awesome intake but loses the stock appearance.
The rpm is great also but taller and non stock appearing also.
The ch4b has been better than expected on my 496(I don't have enough clearance for the rpm and the ch4b has more bottom end and low midrange than the sd in my HEAVY car.It also cleaned up the idle vs the sd in my low compression motor.
It makes good power and is stock appearing if that matters for you.