I was thinking about having some kind of intake system installed somewhere down the road, either Air Raid or K&N. Anyone who has an intake system, how has it affected performance? Any noticeable differences at all? Thanks in advance.

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1990 F-150 4x4
XLT Lariat, 302 V8
4.10 gears w. rear limited slip
Gibson shorty headers
40 Series Flowmaster exhaust w. dual 3" chrome tips
K&N air filter
Delta diamond plated toolbox w. bed liner and a grey Ford trailer hitch cover
Great Alpine cd player
Modest amp and tweeters
15x8" custom rims
31x10.50" p.o.s. a/t tires

Future mods. include a 1.5" front susp. lift, 32x11.50" muds, a superchip, possilby an intake system, new speakers and amp, and a paint job!