Wondering what my options are for broken coil. Right rear broke on a 40th anniversary with the bilstein suspension. I want to replace the pair of course. Are the coils different between a normal and sport suspension? Can I just install a racing beat spring set? I don't really want to lower the car.

 

they’re different for the 40th Anniv model like the Shinka, both with Bilstein shocks from Mazda
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If you are replacing with non-OEM springs then you must replace in pairs and if you can afford it I recommend a matched set of four springs. This will make sure the spring rates work well with each other and improve handling.