Worked great, ordered Saturday, received Memorial Day Monday, busted the fuel filter on my 94 Chevy 1500 5.7 liter 350 and screwed the adapter into the back of the filter, then screwed the barbed hose adapter into the back of the brass adapter and twisted the key to get the pump working and the boom is only 4.5psi and the manual says 9-12psi, replaced the fuel pump and the trucks run like new. This pressure gauge has made life easier when troubleshooting a truck when it starts hard and gets stuck at a red light. I hope this long review @$$ helps someone. It is highly recommended to have one in reserve.
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