Probably because nobody wants to pay more than $1500 for some coils now lol. But, some of the JDM companies are somewhat falling behind on the tech front in suspension tuning, with some companies not using the new double digressive piston designs and such. Some of the lower end brands (Fortune Auto, BC, etc.) are bringing the DD piston design into the low-end coils, at a very competitive price point. The JDM companies can't really compete with that unless they make some big changes.
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