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dont worry about that with your mods. if you dont run nitrous, supercharger, radical NA built engine you should be fine. they only somewhat add power in those applications.
Getting larger fuel rails will be like running a cut out after the stock mufflers.
Don't even worry about bigger fuel rails if you haven't installed a better fuel pump first. Most cars require upgraded fuel rails due to fuel starvation when using a Nitrous kit since it also taps fuel from the rail.