Mac, Kerker 4>1, `78 LTD, oil filter access.

Hey everybody, anyway I`m, slowly splicing a `78 KZ LTD together, I have a "good" Mac, and 2  "krusty" Kerker 4>1 pipes for Kawasaki KZ 1000. Do any of you know offhand, if either pipe needs to be backed off so the oil filter cover will clear, when changing oil? As always, Thank You!

My KZ1000 has what I believe to be a Mac pipe, and I can replace the oil filter without any issue.  There were different versions of the Kerker header, some that went straight down the middle and some that bent around the oil filter cap.  If you have one that has a hard bend to the right, it should clear the filter.