I was wondering why my rear bank was off while tuning, and it was soooo loud under the hood.

Aparently, when you delete your EGR.... it's a good idea to cap off the damned EGR inlet on the rear header

Move along, nothing to see here.

2005 Ford F150 SuperCab FX4 1964 Chevrolet Impala SS 1998 CSVT: 354HP/328TQ @ 10 psi, now gone