Just wondering if the 884 and 885 coils for the Tacoma and the FJ are the same or different somehow. ARe the regular factory coils the same too? I realize 885 are stiffer than 884's, but what I mean is the 884 tacoma and 884 fj the same and 885 tacoma and 885's for the fj the same? is the number just a model number or it based on a spring rating system or something.