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-an fittings and lines are way way cleaner, i support your decision. I love not having stock lines, supports way more fuel, just a way cleaner setup, especially if you have 1600 cc injectors in the secondary.
u can get adapters that screw into the s4 fuel railes. they are m12x1.25 and m14x1.5 if i remember right. the just screw into the sotck rails and the -6 adapter screws right on
ofcourse I bought ******* aluminum male an bungs Whoops just going to wait for cash to get custom rails, for now I'm just goint to use the stock primary rail and use hose clamps..