Im running the Walbro 255 in my "01 LS1. 400 RWHP motor and I was spraying another 150 shot on top of that at one point and never had a problem with running out of fuel or running lean. Like everyone else said on noise, they are fine. I head alot of stock intank pumps that are louder.
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'01 Onyx Z28 12.75 @ 113.24
'67 Camaro 327
'72 El Camino
'87 'Burb. 6.2 Turbo Diesel
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