Do the spitfire pumps have a new canister unit and do you have one which will supply enough fuel for over 400 hp in SC form
Yes/no 
The new pumps are a complete unit with all the advantages over OE as mentioned above, these are good for 350-400 NA depending upon rail pressure and 320-380 SC etc.
Once you are over 400 NA or 350 SC then the option is to convert your old unit and fit a new turbine pump, this can be one of several pumps we use (though not Walbro).
Fitting the pump is the easy bit, converting the unit eductors to match the new flow, replacing all the seals including the elec connector seal, wiring harness and whatever else needs doing is the tricky bit.
These are about £195+ vat for most pumps (included) but if you need something really special for 600bhp or whatever we would need to check the extra cost of the required pump.
We did most of the Audi conversions and another 100 since, quiet, reliable.
But I'd rather sell you a pump for £100 and walk away when it doesn't work in the unit correctly.
NOT
