.. like what?
I dont think there are any 'power' restricting devices or un-necessary utilities on your engine.
Any older accord owners want to back me up on this?
I'm really not too sure, so dont take my word for it, but I wouldn't think there are any restrictive .. items.. so to speak.
Check out
www.ebay.com if you really cant afford to buy brand name, AEM, Injen, etc...
Of course you always run risks of buying shitty quality junk on ebay, but if you're really strapped for cash, that might be your only option.