Originally Posted by bigjae1976
IMO, you have to decide how much you are willing to spend first.
Does the E9X kit use a beehive spring for the rear? This is what makes the TCKs unique for the E46s. Apparently a straight 60mm coil tends to bind since it is not spring on shock design in the rear.
The E9X kit does not use the beehive springs in the rear like the E46M's did.