both, you need the pump to ensure that you are getting enough fuel when you are on it, and you need a adjustable fuel pressure regulator to regulate the amount of fuel going to the injectors, at the stage you are at right now with your mods don't bother messing with the fuel pump or regulator unless the pump goes out.
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1991 Lx sedan 5.0, 5spd, GT-40 Heads, Cobra intake, 73MM mass air, 65mm TB, FPR, 24lb injectors, E303, Headers,off road H-pipe, Flows, K&n , hurst, 3:55's, pullies, etc...
Best ET 13.5 (2.15 60ft)
Best MPH 103.9
On semi-bald street tires
New mods! electric fan, nitto drag radials, mac upper and lower control arms, HD trac-loc, lakewood 50/50's on back, shift light, centerforce dual friction, and rebuilt heavy duty T5
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