Stainless Steel?
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EDIT: Here look at their website - http://www.powerflowracing.com/1home.html
it actually says:
COTTON-FIBER AIR FILTER
The perfect addition to the PowerAdder™ MODULAR AIR INTAKE SYSTEM
If you mean the actual type of filter, as in shape. These are 'cone' filters. The stock Fbody air box uses a panel filter. You can also get cylindracal filters, which just don't tapper off like cone ones. Plus many other shapes.
Volant I beleive make a twin cone induction kit for the Fbody and K&N make a large oval filter kit. Neither are proven to out perform a aftermarket lid on a stock air box.
Cone filters can work well as it allows a greater surface area in a smaller space but for a n/a application such as bolt ons and maybe a cam the stock air box can probably flow well enough.
The OEM paper filters have also been tested and can flow enough air for about 500bhp n/a, a freer flowing filter such as a cotton weave like K&N or a foam filter will flow slightly better but at a cost of filtering efficency. If you added just a K&N filter to the stock airbox you'd see little or no gain in performance because the filter itself really isn't the restriction.
I may be wrong, but I'd be willing to put a bet on it.

Its completely stainless steel, since you can see through it its for city use only but I can see great gains to be obtained, wish I knew where to get one for my car though

Its completely stainless steel, since you can see through it its for city use only but I can see great gains to be obtained, wish I knew where to get one for my car though

And yes you could see through it. I don't doubt they flow well, but that's because they don't filter!!!!! Sure it'll stop twigs and flies and such but thats about it.
Personally if I had them on my car, I would not run the engine.
If it doesn't do that then why bother running it at all?



Here's a stainless one. 
