My suggestion would be: K&N air filter and remove the silencer, gears(3.55 or 3.73), MAF 73 or 75mm, h-pipe w/cats and high flow mufflers(yours have probably had it already anyways). This would be the minimum, a cold air kit would be better.
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Rick
My 89lx(updated 2/21/2001)
My 97 Cobra