I just had JBA longtubes and their off road X pipe installed on a 2014 Mustang GT 5.0. First of all, the fitment was HORRIBLE! X pipe was 2 inches off from collectors. Called JBA and they told me to use a ratchet strap to pull them together to get the X pipe on! Now, my air/fuel ratio is bouncing like a ball from 12 to 16! My tuner is at a loss as to what could be wrong. No codes. HELP!!!! This is my daily driver!