I would not use a UPR K member on a daily driver. Yes it is a hell of a lot lighter than stock, but it isn't designed for turning at all. Even with normal street driving it will feel unstable.
The Maximum Motorsports is a little heavier than most aftermarket K members (still a lot lighter than stock), but it can be driven on the street just fine. You will need to upgrade the A arms though, and sway bar relocation. I'm probably going to go with Griggs Racing for my Tubular K member and A arms.
Faster than a speeding...............
2001 Bullitt being prepped for track duty
Corners > Straight line
HID end all thread