Just bought one of these.

I already have V & A short shots, a larger filter under stock cover and a fueler fitted. HD state for EFI models you will need to re-calibrate. Do they just mean adjust the existing fueler? Maybe it will be ok with current Stage 1 settings?
Any advice greatfully will be received.
Thanks

 

If you already have a tuner/fueler you should be good to go. You're just swapping one stage 1 AC for another.

 

Great thanks that's what I hoped. Wasn't sure if the new one had a higher flow rate etc.