Hey guys im new here but had a few questions,

I have a 2004 GTP that is 100% stock.

I'm thinking of doing some easy mods, and im looking at Intakes. I saw this pretty cheap one from a place called "MQT Auto Parts"?? Here's the link 2004 2005 2006 GRAND PRIX GT GT1 GT2 GTP 3.8 AIR INTAKE : eBay Motors (item 140375076056 end time Feb-15-10 22:13:54 PST)

Would this fit on my 2004? What does the 3.8 mean? (I saw a 3.5 and dont know which one to get) What would be the quality of this product and is there anything else I would need to buy to accompany this with a stock car?

Much help would be appreciated!

Thanks