Yep as above, there is no point on a dc5 you will lose power, to have a lower vtec changeover point you need breathing mods and some sort of mappable ecu.
the cheapest way is to fit a second hand spoon 2-1 and b pipe, hondata airbox mods with a k&n panel and a mugen ecu all in probs around £600 if you hunt about.
you will lose economy with the ecu tho.