It would be very rare to see an OEM loom have a MAP sensor shielded. If Cossie's have them, they would be a rarity. Must admit I've never even looked at a Cossie, it's mostly jap cars I'd see

Maybe Cossies are strange that way, but in 15 years or so mucking about with looms, ecu's on Jap cars etc, Ive never needed to shield map sensor wiring, nor seen a car with it.
Any custom wiring looms I've bought or patch harness' from ecu manufacturers, again have never shielded the map sensor wiring

And have never had an issue where even thought to shield it.