^ I searched and looked for adapter (2.5"ID to oem bearing) that fit in oem mount and got K-mac camber plate. However, provided K-mac adapter only works oem ID springs. I installed without adapter and I realized aftermarket spring was not fit on K-mac bottom plate. That's why I took off.
if someone wants to install this spring to oem mount, needs adapter that fit 2.5"ID to oem bearing.