Yes, that is a very good approach, if you can't use other technology due to packaging constraints, or noise, or emissions.
The best way, and one we are lucky to have available is a tuned length exhaust. By having the diameter right for high rpm flow, paired with the right length before the merge collector, combined with the right diameter and length after the merge collector, you can create a best of both worlds pipe.
The length assists low rpm and the diameter supports high rpm, it literally is a science, and the few companies that make them for rocket's have nailed it, mainly Reband/CES.
When you look at their dyno ploys you'll see a kind of double hump in the shape of the torque curve. The first hump is where the head and cam flow best, right around 2500-3500RPM, the second hump at around 4500-5000 is a result of the exhaust tuning.
This is how those pipes create so much more up top without losing much on the bottom, and why, unlike so many vehicles we can simply bolt on a good 35hp with just an exhaust. The Coyote powered mustangs also see immense gains from long tube headers, for the same reasons, very restrictive stock exhaust.
Carpenters pipe is a bit of a different animal, it trades more power from the bottom for even more up top. Short primary length and larger primary diameter are how it's achieved, just a different take and different power band.
Very, very few cars or motorcycles, have enough aftermarket support to be able to pick a power band like we can by selecting the right manufacturer for where you want to make power.
HARLEY: Harley's are a world full of misconception. Those very common individual pipe exhaust, 1 per cylinder, are actually terrible for power. By not combining the exhaust they leave a large time gap between pulses, and that time is enough in some cases to allow fresh air to flow all the way back up to the valve, leading people to the conclusion that back pressure is needed to prevent that.
In reality if they would use a 2 into 1 with proper primary length, they could use larger diameter pipes for high end power with no risk to the motor, and it would make more power