has anyone tried the powercables from NGK
 

the site says that they are really good, but i am wondering if it's worth the extra money to buy those or should i just go with the 10mm and IR spark plugs
what do you guys suggest for my car for better performance?

i do have and extended fuel rail and AEM fuel filter, cat back exaust for mods
and right now it smells like too much gas is getting through...it smells like i am driving a dirtbike
also the plugs are slightly fouled and they are the wonderful crappy boshe which i think is most of my problem...
your opinion is greatly appreciated