Uhm, a 3.5 L Altima (2002/2003) and you NEED to change plugs and wires?
Maybe you meant you WANT to change the plugs and wires.
Unless you have very, very, special circumstances, there is no reason to change the OEM setup with performance improvement in mind. If you think you will see performance gain by means of a switch of sparkplugs or cabling on this engine, you are in for a surprise.
Things could improve somewhat if you had a '67 <insert your favourite muscle car manufacturer here> stored since '76 AND still holding the original plugs and cables...AND in need of a tuneup, but spending $ on plugs for a Nissan VQ30DE?
There is a LOT of marketing money behind fancy plug advertising. For every single set of "advanced" plugs, cables, intakes, tinted bulbs, exhausts, pads, wings, scoops & you-name-it thing sold out there, there are hundreds of accountants laughing all the way to the bank.
Do not believe everything you read & see.
Buy some music with the money. Spend it with the GF on a good time.
