sorry 4 the late reply,i been working flat out on the 6 to get her ready 4 S/Charging... not long now
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u can use what ever u want with dual feed set up,i had an FSE with a Cossie FMU and all was fine with the S/C on ,i`ll post some pics when i get my camera back
it`s actually safer when increasing performance and fuel pressures, as both the rails get equal pressure,and less chance of small airlocks.