No they are just the easiest to make fit. Its ok but its not that good. I hate mine I want something that goes ON the bumper not that u screw to the bottom...
This^ lip is actually really close.. it almost fit my bumper but its a little short on the sides. Mark would it be possible for me to get one like this in abs flexible plastic, then we use it to try and make a lip that fits directly by maybe making little tweaks and what not? I'm down to help. Maybe I'll buy the lip and bumper and send them to you to try it? Actually I'd just drive up and meet you guys in person. LMK if this sounds of interest to you