I removed the center resonator on both 450 SEL 6.9 and 190 E 2.6 and found a deeper sound. No drone at highway speeds or idle. No downside that I could notice at all and particularly in the v-8, the sound to me is proper.

Interestingly to me, after the center was pulled on the 6.9 and after having driven it for awhile, I had an x-pipe grafted in as close as I could get it to the front of the car. The idea is to even out the exhaust pulses and increase scavenging. The effect was that of a small muffler.

I have read and posted such, that the old hot rodders could put in a couple of crossover pipes at different locations and do without mufflers completely.