thats all youve heard about the quality and performance on DZ's.. that they are inches away (on some chart that i have yet to see) away from "APC". i dont understand how that explains how the actual strut performs..... i personally do not run DZ's but i have ridden in an EG6 that had them as well as Neuspeed race springs and i serously could no tell the difference compared to my koni blues with H&R race springs. And we do hold track races in a small club called willamette motor club here in the NW where we test our cars monthly.