I spoke with a guy for 1/2 hr. at Endurance....I didn't buy into his hard sell and so of course now I get advertising, spam, and phone calls (for the last 6 months) Don't waste your time (Even though Danica looks good)
Don't remove the bumper! ( unless you have another reason) Its an easy thing to do, just remove the top cover and slip them in. (the nut might be metric, but still a common thread)