I have the stock air box in my 745 turbo. I just replaced the air filter. What would be a good way to get cold air in there? I notice the flap at the bottom, and the rubber around that flap is old, crusty, and broken in some parts. I was thinking of cutting a hole in the bottom part, and running some PVC down near the front. Has anyone done this? What size piping would be good? Does any water get up there?
Can I do anything to the flap? How do I know if it even works properly? The car heats up real fast, like a block or two of driving and the car will be up to temp. Does the flap close after it's warmed up? I just wonder if i'm starving the engine of cold air if its not working properly. Thanks.
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