The hot water pipe did not need as much modification, but I also added a couple of 90 degree bends. Since doing this work, I have noticed a decrease in water pressure on the cold water side. If I had to guess, I'd say it's a 30-40% reduction as compared to the hot side.

Do 90 degree bends reduce water pressure?

My understanding of plumbing is that water flows more like electricity than air, so the 90 elbows should have minimal effect on pressure - unless the elbows all have a reduced interior diameter.

How much water pressure do you lose with 90 degree elbow?

A hard turn 90 degree elbow equals 17 feet of straight pipe. Two hard turn 90 degree elbows as displayed in Figure 2 equaled the pressure drop of 52 feet of straight pipe!