The Illuminas are an adjustable, TEMS compatible damper. I'd have to say the GR-2s fall about in the middle of the Illuminas' adjustment range (it's been a while since I drove on a new set of either). If you've got old struts in there, anything new might feel simply amazing to you. Replacing tall and soft springs and replacing springy dampers on such a heavy vehicle makes a very notable difference. TEMS is nice but it's nothing I'll ever got out of my way for.
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