I installed Mac LTs and o/r h pipe and i got the code p1151 and p1152. Recently my car started kinda being hesitant upon acceleration so i sea foamed, changed oil, fuel filter, and spark plugs. will the mils fix the problem?

 

As long as your front o2 sensors (the ones that get the air/fuel ratio) are plugged in, it should be ok. The MIL eliminators just turn off the check engine light. The rear o2 sensors are just there to tell you if your cats are working (the MIL eliminators hook up to the rear ones obviously).

I'd recommend getting a tuner. The low end torque sucks after LTs and an o/r mid-pipe. The tuner will more than correct that problem and you can get it to program your computer to turn off the rear cats.