neither will help you a whole lot, i'd guess the catback would help more but you wont see more than a tenth or so improvement, what you need is more practice and gears
i through a bunch of parts at my car before i had the 3.73s and didnt see hardly any improvement whatsoever, i did read your previous post and im sure that if you get a good run in you could hit low 15s as it sits if you get good traction, get gears/full exhaust/pulleys/ and bump your timing and you MAY hit low 14's/high 13's
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88 Notch, B&M Ripper, 3.73's, Ported E7's, Explorer int. w/ ported lower, pulleys, 1.7RR's, BBK headers, off-road H-pipe, flowmasters, subframes, 65mm TB, March ram air ,MSD coil, U/L control arms, 155lph f/p, Crane Adj.FPR, Nitto drag radials, best 1/4--> 13.76@101.4 on a 2.17 60ft
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