39mm OD inlet hose tail. 21mm OD bypass hose tail. 3/8 sensor / heater hose thread. 28mm diameter fan centering boss with 4 x M8 threads, 52mm diagonal centres.
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39mm OD inlet hose tail. 21mm OD bypass hose tail. 3/8 sensor / heater hose thread. 28mm diameter fan centering boss with 4 x M8 threads, 52mm diagonal centres.