I had UPRs on an old car and they were garbage. I had double adjustable uppers and they WOULD NOT stay at the length that I'd set them at, causing my rear end to get crooked and causing major tire rub and it wouldn't drive straight at all. Not to mention they were noisy! noisy! noisy!! Everyone else seems to love UPRs crap. I think their stuff is just that. Crap. I switched them out for ones from UMI Performance and they were great. MUCH more quiet, better ride, no stupid problems. I'd recommend Maximum Motorsports or UMI. I hear good things about some of Steedas control arms, too.