WyeMe:I have a tight area in which to do this so the #4 Wye is what I need in this situation.
Is there any reason that you need a #4 wye? This wye matches a #8 turnout frog angle (approximately). Are you using #8 turnouts on your railroad? If you have a tight area you can save some space (length) by using a lower number wye.
According to dimensions in the Walthers catalog, the Walthers/Shinohara code 83 wyes have the following overall lengths:
#5: 13-7/8 inches
#4: 9-23/32 inches
#3: 7-7/8 inches
#2-1/2: 7-3/16 inches
#2: 6 inches