ok im trying to order my drop mount from hasport right this second and its asking what kind of urathane i want im guessing thats the metal its built with but im not sure some one that has already done a swap like this (b18b1 all stock still) PLEASE help, i already have the mount selected and now its asking for the urathane and the options are
u62a (street)
u70a (race)
u88a (extream race)
u94a (most extream race)

thats exactly what my options are to the T
please no suggestion to what you think the right one is i cant afford to buy another i need the RIGHT one