A friend had those HKS SP, he didn't like them on street. He said they were very bouncy on the rear in street, even stiffer than his viper acr-e, but he was on very short tires (265/35/18-295/30/18) and sat it very low (which should affect the ride quality).
At the track they were nice.
And you need to get SPL FUCA if you don't have them.
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2010 370Z Touring Sport Pearl White 6MT Powered by:
Fast Intentions - Motordyne - Stillen - OS Giken - CJ Motorsports - Mishimoto - MCA Suspension - SPL - SuperPRO - RJM - Z1 Motorsport - Zspeed - Volk
My Humble Journals
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