Paul, I think the idea behind this screen thing was a gimmick to make you think you would get better fuel mileage. It's intent was to break up the fuel droplets for better atomization,on the down side,it adds restiction. I read an article years ago concerning gizmos and whatnots that were sold to get better mileage. The gist of it was that on a dyno they made no difference at all,but, under driving conditions,they did help.How is this?? If you install something to get better mileage,you will get better mileage because you are driving for better mileage,pure psycology. Stan in Montana __________________________________________ Yahoo! DSL ? Something to write home about. Just $16.99/mo. or less. dsl.yahoo.com