would a K&N and some cats be not enough?

[sedanman]

start with the free stuff take the air silencer out and bump up the timing, then get under drive pullies they are the best mod for under a 100 bucks hands down. Then save to get gears you will feel your biggest improvement with the install of gears. Then do the exhaust.

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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