welcome to the forum, but please use the search function. This has been answered before...
Bigger spark plug wires. Grounding Kit. Hondas love extra current...lol
It's been proven on dynos that aftermarket ignition leads make no power difference at all, they give scope for big powerbuilds as the OEM items are only good up to a certain degree!
http://www.ek9.org/forum/resource-area/9139-beginners-must-have-mods-ek9-ek4.html
To read this thread, you must.