The Concept One drive allows you to use Lingenfelter pulleys to change the boost levels.
The factory compressor that comes with the GMPP accessory drive does not work well with Vintage Air etc. I have read that the CTS-V compressor does because it is not variable displacement. Ideally you would be using a Sanden compressor.
I modified the VA bracket to allow me to mount a Sanden compressor down low on my AME subframe with an LSA without making subframe mods.
Don
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