Stock fuel system??

[Silvafoster]

What size is the stock hard & rubber line from tank to filter? Trying to improve fueling w/out going aftermarket due to 1/4 tank issue. I know I'm reaching, but on 6-11-08, dynoed 495hp / 1012tq w/upgrades in signature & stock fuel systom. I know I'm pushing the limits, but trying to break 500hp. Thinking about going w/GDP big line kit & also possible replacing the line from the hard line & the elbow into the filter, then cleaning out my air filter & adding a fuel additive w/cetane & hopefully gain the 5hp. Any other advice is appreciated. TIA

 

[BBRam]

If you want to gain something, the banjo bolts between the filter housing and the CP3 are the biggest restriction. Plenty of power can be made with the oem line from the tank to the filter housing.