you get what you pay for. after having issues with the std holley blue regulator, i bought a Mallory. instantly the pressure guage stabilised & the carb no longer starved for fuel. after pulling the Holley regulator apart, i realised why they're rubbish. i now use a Magnafuel pump & regulator & have zero issues. i modified the Holley blue pump to be my trans cooler flushing pump, it seems to be in it's element in that job. hand on heart i'll never use a Holley blue pump & reg on any car i own til the day i die. cheap junk pump & regulators are for cheap junk cars. i own a Mopar so thats removed the cheap junk part of my story.