Kclank Posted March 7, 2019 Share Posted March 7, 2019 Can someone point me to what the stock springs ratings were for a stock '72-'73 S30, for a common out the door manual transmission with a/c model in the US. Second part of question is what are people using for street performance mods of this car? Hope the question is not to general. Quote Link to comment Share on other sites More sharing options...
jhm Posted March 8, 2019 Share Posted March 8, 2019 IIRC, stock spring rates were in the range of 100-140 lb/in? At the risk of gross generalization, most "lowering springs" are in the range of 180-200. If you're wanting stiffer spring rates, most people go with adjustable coilovers. Hope this helps. Quote Link to comment Share on other sites More sharing options...
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