I have just replaced my top and bottom hoses on the 408. The ones I used were made by Mackay Automotive and were after market replacements for hoses used on the Ford Falcon XD 4.6 litre V8 Cleveland.
Top Hose: Mackay No. CH1197 replacing oem AKM 5235. I had to reduce length by 40 mm to achieve an excellent fit.
Bottom hose: Mackay No. ? replacing oem EDG826OA This is a double curvature hose and I cut off 20mm at engine end to ensure it did not touch the chassis at the side. I understand that in some V8 fits this hose is in 2 lengths with a steel spacer. Not necessary in my case.
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