I would like to buy a piggyback for my build but I don't know if the vafc types are good enough. Stage 2 bc cams, 11.5 compression pistons, header, intake ...I think that's all that matters in terms of tune in my build

 

What year is your car?

Vafc is not going to cut it with mods like those, been there done it.

You should be on a fpro/kpro EMS or haltech with the cams alone.

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with those mods piggyback isnt gonna be enough from what Ive read. (No personal experience) BUT the best piggyback on the market is the GReddy E-Manage Ultimate.

Haltech retains all factory ECU stuff and OBDII if thats your reasoning