Some folks seem to think that not all aftermarket dumpvalves are suitable for GM turbo´d cars with hotwire airflow meters.
Is there anything to that?

Bailey Motorsports´ dual piston valves are supposed to be better for our purposes (according to the manufacturer anyway) but what possible ill effects would I suffer if I fitted a generic Cossie aftermarket dumpvalve?

Thing is, I want to keep costs down..... and a used Cossie unit is easier to come by.