Selling my barely used racing beat lowering springs. $80 shipped in the lower 48.
Photos have serial numbers and pictured car is mine with them on. I had these on Koni Str.T shocks. The ride height was ok, as I never bottomed out anywhere, I just wanted much stiffer springs.

 

I'll buy those, do you have any info on the spring rates? At any rate, I need them, so I'm pming you.

 

http://www.racingbeat.com/Miata-1990...ets/54084.html
from the above link "These springs have been designed with a rate increase of approximately 21% (front - 195 lb/in) and 30% (rear - 145 lb/in) with a modest drop of 1-inch (front) and .75-inch (rear). (As compared to a Miata equipped with a manual transmission and non-sport suspension.)

 

I seen that, I looked them up but its not the exact part number. I figure they're just outdated and that is the replacement part numbers. I still want to try them on my car and see what happens.