Thanks... I am looking at CAI for the Elise.
There are three designs out there right now. All three are distinctly different in design and price.
CAI # 1 - Designed by ITG that makes a lot of F1 air intakes - $699.00
The ITG filter has a carbon fiber housing around the filter, that ends up pointing in the vicinity of the air inlet on the rear fender. Supposedly the filter housing is designed for optimum flow around the filter. Note, however, that there is no heat shield separating the inlet from the rest of the engine behind the wheel well. The installation of the ITG filter necessitates the removal of the wheel well liner. So theoretically, some warm air from the engine can recirculate back towards the inlet. But supposedly, the carbon fiber also acts as a heat shield from the engine since the CF and resin aren't good heat conducters.
Next candidate... ForcedFed Cold Air Intake. Forcedfed is well-respect turbo outfitter - Cost = $425.00
Forcedfed, has a relatively straight MAF adapter tube, that attaches to the intake via some silicone SAMCO fittings.
They also designed a heat shield that separates the engine compartment from the filter. So only the air coming from the fender inlet and wheel well gets to the filter.
Finally, the Pipercross CAI- About $575.00
This system is a new for the Elise and comes from Pipercross in England. The intake is much, much longer, but puts the filter literally right at the fender inlet.