Be careful, with those regulators , the ethenol , hardens the diaphragm and the leak, spray fuel & yer car burns down !!!
If you can find one the BEST one is a Malpassi Filter King made in Italy superb piece of equipment .The only one that works according to a C.A.R.B. report I read on fuel regulators, it removes the pulses in the fuel line to irradicate the hammering the valve takes in the float bowl