Ok, I get it now. I thought you were saying that you had CPP trailing arms also and they were 3" tubes.
Depending on how you are at fabricating will determine if this is a smart choice for you. If this is at all unfamiliar territory for you then the answer is send it back. But if you are an accomplished welder then the fab will not be to difficult.
Remember if your welds suck then you will have a really bad day if it lets loose while you are driving.
But also fabricating a new bracket will allow you to position the bar at the optimum geometry for your vehicle.
Having the bar as flat as possible and just below center is best. reducing the arc the bar would make if mounted at an angle.
