I don't think this would make a difference under the hood. The filter does not have a buffer to insulate it from the rest and it has no way to get cold air in from outside the engine bay. The only thing I would suggest to you short of putting back in the stock airbox with a highflow filter is to build a partition that sort of isolates the filter from the rest of the underhood heat.
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
Volkswagen Passat Forum
Passatworld is a forum community dedicated to Volkswagen Passat owners and enthusiasts. Come join the discussion about mods, Quattro, Turbo Diesel, reviews and more!