Ebay Performance Auctions? And advice needed...

[BadBowtie03]

The air intakes on ebay I was wondering are they any good? and which ones on there should I get? They are only about 25-35 bucks...
How much power realistically?

The pulleys also are on ebay for the accesories are they any good? Which ones are the best?
How much power?


Ive also seen a couple cam gears on ebay and was wondering are there any ones to watch out for and what exactly do they do? do they just add timing or what?
How much power?

What is a vtec controller and can it help my car?? How much and where can you get one?
How much power?

Is there any thing else that can help my car have more power but not where you can hear the ehaust?? Would a free flowing cat help it and not make it louder? And what is that little bullet looking muffler inline with the exhaust? Is it just a resonator? Could I remove it and make it have more power and not be louder or where you can hear it?

Is there any other small mods to do to the engine to help it out?

Thanks Alot...