02 gt throwing codes help please

hmm sounds like the 02 Sensors in your manifolds went poop
i pulled this off obdcodes.com
A code P1151 may mean that one or more of the following has happened:

Electrical:
Short to VPWR in the harness or HO2S
Water in the harness connector
Open/shorted HO2S circuit Corrosion or poor mating terminals and wiring
Damaged HO2S Damaged PCM
Fuel System:
Excessive fuel pressure
Leaking/contaminated fuel injectors
Leaking fuel pressure regulator
Low fuel pressure or running out of fuel
Vapor recovery system
Induction System:
Air leaks after the MAF
Vacuum Leaks
PCV system:
Improperly seated engine oil dipstick
EGR System:
Leaking gasket
Stuck EGR valve
Leaking diaphragm or EVR
Base Engine:
Oil overfill
Cam Timing
Cylinder compression
Exhaust leaks before or near the HO2S(s)

i would check all red texts areas .. but this is just me

your air intake is after market so make sure everything is tight and didnt wiggle lose on you

+1 on above and in addition, focus on things that could affect BOTH banks at the same time. For example, a vacuum leak in the upper intake, MAF problem, or exhaust leak.

IMO, it is less likely to be an O2 sensor problem as it is unlikely to have both O2 sensors fail at the same time.

Also assume that all fuses have been checked.

im gonna say maf, or vaccum leak.