Restriction of air within enclosed space at intake snorkel - pictures added I have a modified intake pipe in my engine bay. It is 3 inches in diameter, mounted horizontally from the airbox and the mouth of the pipe (where the air gets sucked in) is located VERY CLOSE to the headlights, approximately about 2 centimetres away from the headlight housing. When the hood is closed, it leaves about 1 centimetre of space above the intake pipe. From the scenario above, would the positioning of the said pipe and limited space between the mouth and the housing be restrictive when the pipe pulls in air? If so, how much should the pipe be shortened to ensure that it can suck in air without any restriction from the enclosed space? The intake pipe was changed to a bigger diameter to reduce restriction when the engine pulls in air, but as I shorten the pipe the engine pulls in hotter air as it is closer to the engine block. Is there an optimum size on how much the pipe could be shortened? edit - few pictures to illustrate my point. sorry if I didn't explain it well. An overview. the gold pipe is the said 3inch pipe. Close up. This shows how close the mouth of the pipe is to the headlights which may impede air flow. Hand was a little shaky with this one, but it's another angle of it.