NeilHHi David. Welcome, and hope you enjoy the SC - got a Targa myself The most visual ducting under the engine hood are two cardboard like tubes - they're in your face so to speak. They connect back to a black plastic T piece duct on the left - which is then fixed direct onto a blower motor. All of these components are the HOT air for the cabin. They take air off the side if the huge engine fan and split this cold air via cardboard ducts to each of the exhaust HEAT EXHACHANGERS to warm the air that's then sent down the sills to the front of the car. If someone's fitted a sport exhaust without heat exchangers then all this ducting would be pointless and possibly removed? Possibly worth working backwards from the exhaust to determine any reason for a possible "delete" as opposed to just "missing" Fresh air is all dealt with in a parallel system and blower motor under the front hood and behind the cardboard bulkhead panel Picture hopefully attached - my ducts disconnected while I removed the motor for access to cold start injector.Thanks for the reply Neil, that makes sense, I will have a look at the exhaust system first, it just didn’t make sense why those parts would of been removed, thanks for all the help from everroneous, regards Dave g
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