Slant 6 Split exhaust

As I drove my Challenger on a daily basis (1972-2005), I’ve collected a total of 562k miles on the whole car at this point. I retired it officially in 2005 and then myself 10 years later. Along the way I added various improvements to the car and engine, primarily for efficiency and if I picked up “some” performance with this, well so be it. I thought the Dodge being a Challenger, deserved a real working dual exhaust with bright tips at back. Everything has worked together well including the headers and the exhaust system, and it does sound pretty good, barring it being a six.
Here’s a couple of pics of engine bay.