A buddy of mine put a 6" lift with 35" tires. Runs the Bully Dog Triple dog and 4" MBRP turbo back. He said he has a major loss of power anyone had this symptom. I don't think the factory gears would be under powered it ran like a bat out of hell till he re updated the tuner to the new ABS compadability. Let me know Thnaks

 

Sounds like he may have popped the rail pressure relief valve. Have him return it back to stock and see if it gets any better.