1. welcome :wavey:
2. its vtec, not v-tec, vtech, vetech, etc.
3. you have one header :a:

now on to your other questions....4-1 headers are generally better for higher rpm power while 4-2-1 are more for low to mid range. ceramic will keep your underhood temps down but the coating tends to flake off after awhile. stainless wont rust but usually costs more. chrome is too bling. the evo is a good system. it has a nice deep sound at idle. as for cams, try www.crower.com and pulleys generally dont do anything for honda engines.