No matter what anybody tells you do what you want. If you can't afford a Stillen, JWT, K&N. etc. It's alright to buy what you can afford. I had a K&N then took it off and put one from ebay and never felt a difference. At first I just put the pipes on but then I was planing on selling my car so I sold my K&N to a friend and put the cheapy on. It does the job and it will be better than stock. Remember there is no such thing as a cold air intake for a Z. You just replace the filter with an adapter and replace the pipes in the engine bay. The pipes that go from the nose (intake) to the engine bay are not replaced. Good luck with your Z and use the search here on TT.net before asking questions, alot of people here will burn you quick.