PLUS Engine will NOT rev over 1100 RPM.

2010 G37x Coupe w/ Auto. Trans. - 54,000 miles.

A lot of Aftermarket add ons:
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Stillen Ceramic Headers
Hi-Flow Comp. Cats.
Stillen Cat Back Exhaust
Grounding kit.
Stillen Stage III Cold Air Intakes.
Aluminium Crank Pully.
And more . . .
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I just got home from a 150-mile day, the car ran great, parked then went to drive it 15 min later and this happened.

I tried restarting it several times and hit the VDC Off button- no help...

Can anyone give me some advice on what to try?

Thanx in advance for any help. . .