They hone extrude the intake, replace the cat-back, and recalibrate the computer. Most of the gains come from the computer. All of these things would work on you '97 Cobra, but would cost some $$.
A good machine/speed shop could do it for ya. SHM makes chips for Cobras too.
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'97 Cobra, K&N, Flowmaster, subframes, 4.10 gears, Steeda Tri-Ax shifter, Steeda G-Trac 3, Cobra R wheels w/ Goodyear F1s
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