Hey,

Does anybody know where I can get a NACA duct from, particularly in Australia, or even better in Adelaide? I'd have a crack at making one myself, but from reading up about them the angles/geometry have to be pretty exact for them to be effective. I'd be after one with about a 90-100mm circular connection.

http://www.racerpartswholesale.com/naca.htm
Try here not in Aus but might be helpful.

Cheers, Yeah I came across that one too :)

Theres also a few on ebay, but meh...