AE is the generic base map installed by Ford. I don't know what it means but its the one you need to have. I had AF on my car and travelled up North to have AE put on it, as it was *Coughing* at 4500 rpm with the AF map. Now it cured it and it drives alot more harder.

As for the Manifold. My mate is breaking his FRS to sell and has a near enough brand new (1000 miles old) Blueflame Manifold for sale for around £600.
Its advertised on the RSOC mate.