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Originally Posted by redlin-er
It would be nice if other members posted their hp improvements with this mod. I would like to speak for myself with the intent that others are thinking the same thing, this is a very significant mod if we just had a few more comments from those who purchased the kit.
Pls chime in..........some of us can't wait 
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This is not really a HP adder, it is more of a bottleneck remover. By getting rid of the pressure loss across the fuel rail on high fuel demand you are allowing all 4 cylinders adequate and even fuel delivery. I know several people who have converted to return style have had a major reduction in phantom spark knock as well as a minor power increase due to more consistant and even fuel delivery. I will be getting my return system in the next week or so and will be temporarily setting it at the stock pressure w/o the rising rate to do some datalogging of my own. I'll post up my findings as soon as it is in.