Kevin,
I have the Stull non-functional lake pipes...and my PT is lowered. Does it interfere with jacking up the car...damn straight. I have 3 special jacks that start at 3 1/2 inches and I have to slip one between the end of the lake pipe and the back wheel, get it up a few inches so I can slip another jack in the front. Without the PT being lowered, I might be able to get under the front.
The 4-into-1 non-functional pipes look real good but you definitely can't have the car lowered with those. The 4-into-1 part of the pipe is low enough as it is.
Mine just needed two holes on both sides in the double welded frame part that is under the edge of the cruiser. They've been on for a couple years now with no problems except tightening them up once in awhile.
