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Billfitz · 05-17-2019, 04:43 PM

The original pipe is wrapped with foam insulation. I don't know if it's supposed to keep the air in the pipe insulated from the heat of the engine compartment or the other way around, but I figured if BMW had a good reason to use it I would too.

05-17-2019, 04:43 PM	#7
Billfitz Lieutenant General 8243 Rep 16,082 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	The original pipe is wrapped with foam insulation. I don't know if it's supposed to keep the air in the pipe insulated from the heat of the engine compartment or the other way around, but I figured if BMW had a good reason to use it I would too.
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