[quote=Marian]Staggering... £2700

All indications are that for the best performance with a Mog fitted with DirectThrottlebodies the best EMU is the Omex 2000. That way you don't get into a 'piggyback 'situation
If whoever has fitted it has sorted it properly then they are going for individual TBs. These can be direct to head or via a manifold. In either case, ( especially thelatter) these should be tuned for length etc for maximum performance.
Such TBs should run via direct filters ( such as ITG)
HTH G