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I have always been under the idea that a F.A.S.S. system does not add any power to your truck, but just gives cleaner fuel, and more pressure. But today, after i borrowed money from the bank to fill up my truck, a fellow Cummins enthusiast filling up next to me, claimed his F.A.S.S. 150 gave him a noticable increase in HP. Is this true?? And i didnt really have to borrow money to fill up....not yet anyway:$:
 

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If his truck had a power issue due to fuel starvation before he got the FASS, and then he fixed his fuel supply issue with the FASS, then he would feel an increase in power. But it is just getting him back to the power he should have had all along. I drove a friend's '02 CTD recently that had a dying lift pump. It would fall on its face during WOT acceleration. Now with a FASS it actually moves out like it should.

-Chuck
 
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