I thought you need the hpfp, for stage 2??? I've got my Milltek down pipe to put on, then got to get the hpfp then I'm going stage 2.
If your looking at a REVO remap that the exhaust and CAI are the requirements for stage 2. The HPFP is a requirement of stage 2+. So if you are going to REVO and have the HPFP fitted i would ask for stage 2+.
A representative from REVO suggested to me that stage 2+ is the one to go for after Stage 1 as its not worth the extra HP from 1 to 2 as i was thinking of going for a CAI and DP for stage 2