Can it be??? I removed (2) close to 90* bends & a resonator in each side of my true duals & the low end VE table (normal driving) became way off. Am in the process of re-tuning by increasing the VE in this area. MAF table appears to have remained correct. Perhaps there was previously an exhaust restriction (even @ 2K RPM & 40 kPa)?

 

Every change you make to your car that modifies its ability to pump air will indeed have an affect on your VE table.

 

Yes, I know, but didn't expect it to have such a large effect.