I'm using on a set of titan.I paid close to RM3k,can't really recall the exact price.You can try up the test car,also an ef3.Cheers and Gong Xi Fa Cai!!
You can pm ninja_iga about the titans. They have an EF test car running on titans.
Price ranges are about 800+ for unadjustables but stiffer than stock and 1000-2000+ for adjustables stiffness and high/low for chopshops and new.
Any bro here encounter the same problem?my Passenger side window not working. Read from us 350z forum they claim is a common problem maybe motor issue.