ive got a 99 ford f150 4x4 with 5.4 triton. im looking for a good place to check out performance parts, such as cold air intakes, superchargers, performance chips, exhausts etc.

Try Summit Racing, or Jegs. If somebody makes it, they probably have it, and their staff is pretty knowledgeable. I think theyre all wrenches.
Later
Ed
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http://www.f150store.com
http://www.flowpowerexhaust.com

enjoy.