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Is open top airbox good or not?

Glad mountune are making progress with a package
Mazda MPS runs with a similar set up. There is a matching moulding on the inside of the bonnet, to stop it drawing in hot air from the warm side of the engine bay.
 

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Looking at that engine bay. I can see parts to spruce the engine bay up won't be cheap. Field of plastic lol
 

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obviously the rubber seal sits against the underside of the bonnet to stop any heat getting in but i cant see the point of the front cut out section where you can see the filter? surely theres enough air flow through the 2 normal inlets and the new top one?

its an ugly old thing for sure
 
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