So the HKS one are less likely to stall your car? I only ordered a blitz one because there the only company that made one for the Gt4 (specificly). well, besides some unknowns. Oh, and because I think the ssqv looks like a hair dryer. But if its much better I may look into it.
about the eids:
What this does, (Supposedly): "The HKS EIDS has been developed to buffer dramatic airflow meter signal fluctuations. By buffering these fluctuations the EIDS prevents engine stalling or stumbling associated with sudden imbalances in air/fuel ratio of airflow meter-equipped vehicles that utilize atmosphere venting blow-off valves."