I'll elaborate a little further on what intenseblu already started.
All I need to say is one thing.........make sure you're absolutely positive that whatever you "make" is sealed tight, you REALLY wouldn't want anything getting sucked up a poorly fitted pipe and finding it's way into your engine!
I run a needswings.....I've met the man. It's not a giant corporation, just a guy with a lot of friends in high places, that happens to make very high quality parts. The CAI took a few months to develop, (maybe more!), not a few hours and a six-pack of beer. I know......I was the testbed for the NA intake. I doubt you'd find anyone who has anything bad to say about Needswings, or his parts.
Look on the internet and see what he's done for the SRT-4 tuners.........I feel he's more than qualified to work on my Crossfire! Matter of fact.....he's the ONLY one I let work on my car.
BTW........we were both at the track tonight.......His SRT-6 is one BAD A** ****!