Adding to this as I’m working with Tony now. I worked with Tony 3 years ago for my 2011 Tahoe. I just picked up a 2018 and I text Tony about a 2/4 kit. He answered quickly but when I had more questions via text and email, no answers. I text and emailed him again about when I should be receiving the kit. He text me “ shipping tomorrow “. Perfect, so I call and set up a shop time. Then last night, he emailed me, “ spindles are 8-12 days out” . Wtf?!? Which one is it? I’m thinking of just canceling the order because if it’s an issue getting simple questions answered now, what’s it going to be like later.